Finding the Fourth Proportional to 10,978.59, 15,143.59 and 7,201.97

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.59 : 15,143.59 = 7,201.97 : x
2. Step 2: Convert to fraction form
   10,978.59/15,143.59 = 7,201.97/x
3. Step 3: Cross multiply
   10,978.59x = 15,143.59 × 7,201.97
4. Step 4: Simplify right side
   10,978.59x = 109,063,680.87
5. Step 5: Solve for x
   x = 109,063,680.87/10,978.59
6. Step 6: Final answer
   x = 9,934.22