Finding the Fourth Proportional to 839,499.68, 1,158,479.92 and 457,518.88

Step by Step Solution

1. Step 1: Write the proportion equation
   839,499.68 : 1,158,479.92 = 457,518.88 : x
2. Step 2: Convert to fraction form
   839,499.68/1,158,479.92 = 457,518.88/x
3. Step 3: Cross multiply
   839,499.68x = 1,158,479.92 × 457,518.88
4. Step 4: Simplify right side
   839,499.68x = 530,026,435,500.89
5. Step 5: Solve for x
   x = 530,026,435,500.89/839,499.68
6. Step 6: Final answer
   x = 631,359.90