Finding the Fourth Proportional to 9,301.42, 12,825.50 and 7,172.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,301.42 : 12,825.50 = 7,172.14 : x
2. Step 2: Convert to fraction form
   9,301.42/12,825.50 = 7,172.14/x
3. Step 3: Cross multiply
   9,301.42x = 12,825.50 × 7,172.14
4. Step 4: Simplify right side
   9,301.42x = 91,986,281.57
5. Step 5: Solve for x
   x = 91,986,281.57/9,301.42
6. Step 6: Final answer
   x = 9,889.49