Finding the Fourth Proportional to 9,902.52, 13,665.74 and 5,711.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,902.52 : 13,665.74 = 5,711.04 : x
2. Step 2: Convert to fraction form
   9,902.52/13,665.74 = 5,711.04/x
3. Step 3: Cross multiply
   9,902.52x = 13,665.74 × 5,711.04
4. Step 4: Simplify right side
   9,902.52x = 78,045,587.77
5. Step 5: Solve for x
   x = 78,045,587.77/9,902.52
6. Step 6: Final answer
   x = 7,881.39