Finding the Fourth Proportional to 12,223.28, 16,875.06 and 7,978.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,223.28 : 16,875.06 = 7,978.48 : x
2. Step 2: Convert to fraction form
   12,223.28/16,875.06 = 7,978.48/x
3. Step 3: Cross multiply
   12,223.28x = 16,875.06 × 7,978.48
4. Step 4: Simplify right side
   12,223.28x = 134,637,328.71
5. Step 5: Solve for x
   x = 134,637,328.71/12,223.28
6. Step 6: Final answer
   x = 11,014.83