Finding the Fourth Proportional to 428,632.76, 642,899.90 and 113,114.27

Step by Step Solution

1. Step 1: Write the proportion equation
   428,632.76 : 642,899.90 = 113,114.27 : x
2. Step 2: Convert to fraction form
   428,632.76/642,899.90 = 113,114.27/x
3. Step 3: Cross multiply
   428,632.76x = 642,899.90 × 113,114.27
4. Step 4: Simplify right side
   428,632.76x = 72,721,154,761.61
5. Step 5: Solve for x
   x = 72,721,154,761.61/428,632.76
6. Step 6: Final answer
   x = 169,658.41