Finding the Third Proportional to 19,909,507,264 and 42,658,833,861

Step by Step Solution

1. Step 1: Write the proportion equation
   19,909,507,264 : 42,658,833,861 = 42,658,833,861 : x
2. Step 2: Convert to fraction form
   19,909,507,264/42,658,833,861 = 42,658,833,861/x
3. Step 3: Cross multiply
   19,909,507,264x = 42,658,833,861 × 42,658,833,861
4. Step 4: Simplify right side
   19,909,507,264x = 1,819,776,106,380,400,263,168
5. Step 5: Solve for x
   x = 1,819,776,106,380,400,263,168/19,909,507,264
6. Step 6: Final answer
   x = 91,402,367,836.14