Finding the Fourth Proportional to 3,719.59, 5,129.20 and 2,600.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,719.59 : 5,129.20 = 2,600.12 : x
2. Step 2: Convert to fraction form
   3,719.59/5,129.20 = 2,600.12/x
3. Step 3: Cross multiply
   3,719.59x = 5,129.20 × 2,600.12
4. Step 4: Simplify right side
   3,719.59x = 13,336,535.50
5. Step 5: Solve for x
   x = 13,336,535.50/3,719.59
6. Step 6: Final answer
   x = 3,585.49