Finding the Fourth Proportional to 539,614.72, 744,552.72 and 313,138.72

Step by Step Solution

1. Step 1: Write the proportion equation
   539,614.72 : 744,552.72 = 313,138.72 : x
2. Step 2: Convert to fraction form
   539,614.72/744,552.72 = 313,138.72/x
3. Step 3: Cross multiply
   539,614.72x = 744,552.72 × 313,138.72
4. Step 4: Simplify right side
   539,614.72x = 233,148,285,713.32
5. Step 5: Solve for x
   x = 233,148,285,713.32/539,614.72
6. Step 6: Final answer
   x = 432,064.35