Finding the Fourth Proportional to 9,142.16, 12,615.29 and 7,258.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,142.16 : 12,615.29 = 7,258.29 : x
2. Step 2: Convert to fraction form
   9,142.16/12,615.29 = 7,258.29/x
3. Step 3: Cross multiply
   9,142.16x = 12,615.29 × 7,258.29
4. Step 4: Simplify right side
   9,142.16x = 91,565,396.96
5. Step 5: Solve for x
   x = 91,565,396.96/9,142.16
6. Step 6: Final answer
   x = 10,015.73