Finding the Fourth Proportional to 58,939,857.42, 80,747,892.78 and 56,730,805.37

Step by Step Solution

1. Step 1: Write the proportion equation
   58,939,857.42 : 80,747,892.78 = 56,730,805.37 : x
2. Step 2: Convert to fraction form
   58,939,857.42/80,747,892.78 = 56,730,805.37/x
3. Step 3: Cross multiply
   58,939,857.42x = 80,747,892.78 × 56,730,805.37
4. Step 4: Simplify right side
   58,939,857.42x = 4,580,892,989,754,419
5. Step 5: Solve for x
   x = 4,580,892,989,754,419/58,939,857.42
6. Step 6: Final answer
   x = 77,721,480.68