Finding the Fourth Proportional to 428,086.62, 590,737.86 and 234,491.76

Step by Step Solution

1. Step 1: Write the proportion equation
   428,086.62 : 590,737.86 = 234,491.76 : x
2. Step 2: Convert to fraction form
   428,086.62/590,737.86 = 234,491.76/x
3. Step 3: Cross multiply
   428,086.62x = 590,737.86 × 234,491.76
4. Step 4: Simplify right side
   428,086.62x = 138,523,160,490.03
5. Step 5: Solve for x
   x = 138,523,160,490.03/428,086.62
6. Step 6: Final answer
   x = 323,586.76