Finding the Fourth Proportional to 542,141.71, 748,159.98 and 300,428.31

Step by Step Solution

1. Step 1: Write the proportion equation
   542,141.71 : 748,159.98 = 300,428.31 : x
2. Step 2: Convert to fraction form
   542,141.71/748,159.98 = 300,428.31/x
3. Step 3: Cross multiply
   542,141.71x = 748,159.98 × 300,428.31
4. Step 4: Simplify right side
   542,141.71x = 224,768,441,769.94
5. Step 5: Solve for x
   x = 224,768,441,769.94/542,141.71
6. Step 6: Final answer
   x = 414,593.53