Finding the Fourth Proportional to 21,909,867,492,386, 30,238,406,559,838 and 13,248,757,027,580

Step by Step Solution

1. Step 1: Write the proportion equation
   21,909,867,492,386 : 30,238,406,559,838 = 13,248,757,027,580 : x
2. Step 2: Convert to fraction form
   21,909,867,492,386/30,238,406,559,838 = 13,248,757,027,580/x
3. Step 3: Cross multiply
   21,909,867,492,386x = 30,238,406,559,838 × 13,248,757,027,580
4. Step 4: Simplify right side
   21,909,867,492,386x = 400,621,301,412,474,896,242,442,240
5. Step 5: Solve for x
   x = 400,621,301,412,474,896,242,442,240/21,909,867,492,386
6. Step 6: Final answer
   x = 18,284,971,442,739.06