Finding the Fourth Proportional to 2,503.91, 3,756.55 and 860.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.91 : 3,756.55 = 860.59 : x
2. Step 2: Convert to fraction form
   2,503.91/3,756.55 = 860.59/x
3. Step 3: Cross multiply
   2,503.91x = 3,756.55 × 860.59
4. Step 4: Simplify right side
   2,503.91x = 3,232,849.36
5. Step 5: Solve for x
   x = 3,232,849.36/2,503.91
6. Step 6: Final answer
   x = 1,291.12