Finding the Fourth Proportional to 8,978.24, 12,389.92 and 5,252.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978.24 : 12,389.92 = 5,252.16 : x
2. Step 2: Convert to fraction form
   8,978.24/12,389.92 = 5,252.16/x
3. Step 3: Cross multiply
   8,978.24x = 12,389.92 × 5,252.16
4. Step 4: Simplify right side
   8,978.24x = 65,073,842.23
5. Step 5: Solve for x
   x = 65,073,842.23/8,978.24
6. Step 6: Final answer
   x = 7,247.95