Finding the Fourth Proportional to 866,081.32, 1,195,143.86 and 478,874.39

Step by Step Solution

1. Step 1: Write the proportion equation
   866,081.32 : 1,195,143.86 = 478,874.39 : x
2. Step 2: Convert to fraction form
   866,081.32/1,195,143.86 = 478,874.39/x
3. Step 3: Cross multiply
   866,081.32x = 1,195,143.86 × 478,874.39
4. Step 4: Simplify right side
   866,081.32x = 572,323,782,141.21
5. Step 5: Solve for x
   x = 572,323,782,141.21/866,081.32
6. Step 6: Final answer
   x = 660,819.91