Finding the Fourth Proportional to 9,013.72, 13,520.52 and 2,439.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,013.72 : 13,520.52 = 2,439.88 : x
2. Step 2: Convert to fraction form
   9,013.72/13,520.52 = 2,439.88/x
3. Step 3: Cross multiply
   9,013.72x = 13,520.52 × 2,439.88
4. Step 4: Simplify right side
   9,013.72x = 32,988,446.34
5. Step 5: Solve for x
   x = 32,988,446.34/9,013.72
6. Step 6: Final answer
   x = 3,659.80