Finding the Fourth Proportional to 9,143.80, 12,609.61 and 7,727.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.80 : 12,609.61 = 7,727.52 : x
2. Step 2: Convert to fraction form
   9,143.80/12,609.61 = 7,727.52/x
3. Step 3: Cross multiply
   9,143.80x = 12,609.61 × 7,727.52
4. Step 4: Simplify right side
   9,143.80x = 97,441,013.47
5. Step 5: Solve for x
   x = 97,441,013.47/9,143.80
6. Step 6: Final answer
   x = 10,656.51