Finding the Fourth Proportional to 906,300.42, 1,250,685.54 and 498,395.76

Step by Step Solution

1. Step 1: Write the proportion equation
   906,300.42 : 1,250,685.54 = 498,395.76 : x
2. Step 2: Convert to fraction form
   906,300.42/1,250,685.54 = 498,395.76/x
3. Step 3: Cross multiply
   906,300.42x = 1,250,685.54 × 498,395.76
4. Step 4: Simplify right side
   906,300.42x = 623,336,370,229.31
5. Step 5: Solve for x
   x = 623,336,370,229.31/906,300.42
6. Step 6: Final answer
   x = 687,781.18