Finding the Fourth Proportional to 538,134, 742,624.92 and 311,910.72

Step by Step Solution

1. Step 1: Write the proportion equation
   538,134 : 742,624.92 = 311,910.72 : x
2. Step 2: Convert to fraction form
   538,134/742,624.92 = 311,910.72/x
3. Step 3: Cross multiply
   538,134x = 742,624.92 × 311,910.72
4. Step 4: Simplify right side
   538,134x = 231,632,673,487.14
5. Step 5: Solve for x
   x = 231,632,673,487.14/538,134
6. Step 6: Final answer
   x = 430,436.79