Finding the Fourth Proportional to 9,380.16, 14,016.60 and 7,146.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,380.16 : 14,016.60 = 7,146.72 : x
2. Step 2: Convert to fraction form
   9,380.16/14,016.60 = 7,146.72/x
3. Step 3: Cross multiply
   9,380.16x = 14,016.60 × 7,146.72
4. Step 4: Simplify right side
   9,380.16x = 100,172,715.55
5. Step 5: Solve for x
   x = 100,172,715.55/9,380.16
6. Step 6: Final answer
   x = 10,679.21