Finding the Fourth Proportional to 10,978.08, 15,142.88 and 7,201.44

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.08 : 15,142.88 = 7,201.44 : x
2. Step 2: Convert to fraction form
   10,978.08/15,142.88 = 7,201.44/x
3. Step 3: Cross multiply
   10,978.08x = 15,142.88 × 7,201.44
4. Step 4: Simplify right side
   10,978.08x = 109,050,541.75
5. Step 5: Solve for x
   x = 109,050,541.75/10,978.08
6. Step 6: Final answer
   x = 9,933.48