Finding the Fourth Proportional to 16,051.28, 22,151.16 and 8,978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.28 : 22,151.16 = 8,978.16 : x
2. Step 2: Convert to fraction form
   16,051.28/22,151.16 = 8,978.16/x
3. Step 3: Cross multiply
   16,051.28x = 22,151.16 × 8,978.16
4. Step 4: Simplify right side
   16,051.28x = 198,876,658.67
5. Step 5: Solve for x
   x = 198,876,658.67/16,051.28
6. Step 6: Final answer
   x = 12,390.08