Finding the Fourth Proportional to 58,939,857.05, 80,747,892.28 and 56,730,805.01

Step by Step Solution

1. Step 1: Write the proportion equation
   58,939,857.05 : 80,747,892.28 = 56,730,805.01 : x
2. Step 2: Convert to fraction form
   58,939,857.05/80,747,892.28 = 56,730,805.01/x
3. Step 3: Cross multiply
   58,939,857.05x = 80,747,892.28 × 56,730,805.01
4. Step 4: Simplify right side
   58,939,857.05x = 4,580,892,931,359,598
5. Step 5: Solve for x
   x = 4,580,892,931,359,598/58,939,857.05
6. Step 6: Final answer
   x = 77,721,480.18