Finding the Fourth Proportional to 2,503.60, 3,755.22 and 860.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.60 : 3,755.22 = 860.10 : x
2. Step 2: Convert to fraction form
   2,503.60/3,755.22 = 860.10/x
3. Step 3: Cross multiply
   2,503.60x = 3,755.22 × 860.10
4. Step 4: Simplify right side
   2,503.60x = 3,229,864.72
5. Step 5: Solve for x
   x = 3,229,864.72/2,503.60
6. Step 6: Final answer
   x = 1,290.09