Finding the Fourth Proportional to 518,598, 715,665.24 and 280,134

Step by Step Solution

1. Step 1: Write the proportion equation
   518,598 : 715,665.24 = 280,134 : x
2. Step 2: Convert to fraction form
   518,598/715,665.24 = 280,134/x
3. Step 3: Cross multiply
   518,598x = 715,665.24 × 280,134
4. Step 4: Simplify right side
   518,598x = 200,482,166,342.16
5. Step 5: Solve for x
   x = 200,482,166,342.16/518,598
6. Step 6: Final answer
   x = 386,584.92