Finding the Fourth Proportional to 3,665.57, 5,059.22 and 2,487.02

Step by Step Solution

1. Step 1: Write the proportion equation
   3,665.57 : 5,059.22 = 2,487.02 : x
2. Step 2: Convert to fraction form
   3,665.57/5,059.22 = 2,487.02/x
3. Step 3: Cross multiply
   3,665.57x = 5,059.22 × 2,487.02
4. Step 4: Simplify right side
   3,665.57x = 12,582,343.59
5. Step 5: Solve for x
   x = 12,582,343.59/3,665.57
6. Step 6: Final answer
   x = 3,432.58