Finding the Fourth Proportional to 10,543.54, 15,810.42 and 7,258.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,543.54 : 15,810.42 = 7,258.18 : x
2. Step 2: Convert to fraction form
   10,543.54/15,810.42 = 7,258.18/x
3. Step 3: Cross multiply
   10,543.54x = 15,810.42 × 7,258.18
4. Step 4: Simplify right side
   10,543.54x = 114,754,874.24
5. Step 5: Solve for x
   x = 114,754,874.24/10,543.54
6. Step 6: Final answer
   x = 10,883.90