Finding the Fourth Proportional to 7,265.72, 9,961.17 and 7,134.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,265.72 : 9,961.17 = 7,134.50 : x
2. Step 2: Convert to fraction form
   7,265.72/9,961.17 = 7,134.50/x
3. Step 3: Cross multiply
   7,265.72x = 9,961.17 × 7,134.50
4. Step 4: Simplify right side
   7,265.72x = 71,067,944.31
5. Step 5: Solve for x
   x = 71,067,944.31/7,265.72
6. Step 6: Final answer
   x = 9,781.27