Finding the Fourth Proportional to 981,778.08, 1,472,494.32 and 262,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   981,778.08 : 1,472,494.32 = 262,128.72 : x
2. Step 2: Convert to fraction form
   981,778.08/1,472,494.32 = 262,128.72/x
3. Step 3: Cross multiply
   981,778.08x = 1,472,494.32 × 262,128.72
4. Step 4: Simplify right side
   981,778.08x = 385,983,051,308.87
5. Step 5: Solve for x
   x = 385,983,051,308.87/981,778.08
6. Step 6: Final answer
   x = 393,146.94