Finding the Fourth Proportional to 790,397.52, 1,185,471.72 and 257,915.76

Step by Step Solution

1. Step 1: Write the proportion equation
   790,397.52 : 1,185,471.72 = 257,915.76 : x
2. Step 2: Convert to fraction form
   790,397.52/1,185,471.72 = 257,915.76/x
3. Step 3: Cross multiply
   790,397.52x = 1,185,471.72 × 257,915.76
4. Step 4: Simplify right side
   790,397.52x = 305,751,839,622.31
5. Step 5: Solve for x
   x = 305,751,839,622.31/790,397.52
6. Step 6: Final answer
   x = 386,832.99