Finding the Fourth Proportional to 2,503.30, 3,755.42 and 860.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.30 : 3,755.42 = 860.08 : x
2. Step 2: Convert to fraction form
   2,503.30/3,755.42 = 860.08/x
3. Step 3: Cross multiply
   2,503.30x = 3,755.42 × 860.08
4. Step 4: Simplify right side
   2,503.30x = 3,229,961.63
5. Step 5: Solve for x
   x = 3,229,961.63/2,503.30
6. Step 6: Final answer
   x = 1,290.28