Finding the Fourth Proportional to 510,792.92, 704,978.32 and 389,705.42

Step by Step Solution

1. Step 1: Write the proportion equation
   510,792.92 : 704,978.32 = 389,705.42 : x
2. Step 2: Convert to fraction form
   510,792.92/704,978.32 = 389,705.42/x
3. Step 3: Cross multiply
   510,792.92x = 704,978.32 × 389,705.42
4. Step 4: Simplify right side
   510,792.92x = 274,733,872,286.49
5. Step 5: Solve for x
   x = 274,733,872,286.49/510,792.92
6. Step 6: Final answer
   x = 537,857.64