Finding the Fourth Proportional to 3,928.59, 5,420.37 and 2,532.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928.59 : 5,420.37 = 2,532.15 : x
2. Step 2: Convert to fraction form
   3,928.59/5,420.37 = 2,532.15/x
3. Step 3: Cross multiply
   3,928.59x = 5,420.37 × 2,532.15
4. Step 4: Simplify right side
   3,928.59x = 13,725,189.90
5. Step 5: Solve for x
   x = 13,725,189.90/3,928.59
6. Step 6: Final answer
   x = 3,493.67