Finding the Fourth Proportional to 19,978.61, 27,570.56 and 11,026.37

Step by Step Solution

1. Step 1: Write the proportion equation
   19,978.61 : 27,570.56 = 11,026.37 : x
2. Step 2: Convert to fraction form
   19,978.61/27,570.56 = 11,026.37/x
3. Step 3: Cross multiply
   19,978.61x = 27,570.56 × 11,026.37
4. Step 4: Simplify right side
   19,978.61x = 304,003,195.67
5. Step 5: Solve for x
   x = 304,003,195.67/19,978.61
6. Step 6: Final answer
   x = 15,216.43