Finding the Fourth Proportional to 10,978.90, 15,146.81 and 7,204.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.90 : 15,146.81 = 7,204.17 : x
2. Step 2: Convert to fraction form
   10,978.90/15,146.81 = 7,204.17/x
3. Step 3: Cross multiply
   10,978.90x = 15,146.81 × 7,204.17
4. Step 4: Simplify right side
   10,978.90x = 109,120,194.20
5. Step 5: Solve for x
   x = 109,120,194.20/10,978.90
6. Step 6: Final answer
   x = 9,939.08