Finding the Fourth Proportional to 2,657,155.82, 3,986,366.42 and 860,039.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,657,155.82 : 3,986,366.42 = 860,039.60 : x
2. Step 2: Convert to fraction form
   2,657,155.82/3,986,366.42 = 860,039.60/x
3. Step 3: Cross multiply
   2,657,155.82x = 3,986,366.42 × 860,039.60
4. Step 4: Simplify right side
   2,657,155.82x = 3,428,432,981,310.23
5. Step 5: Solve for x
   x = 3,428,432,981,310.23/2,657,155.82
6. Step 6: Final answer
   x = 1,290,264.18