Finding the Fourth Proportional to 16,051.97, 22,152.69 and 8,978.45

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.97 : 22,152.69 = 8,978.45 : x
2. Step 2: Convert to fraction form
   16,051.97/22,152.69 = 8,978.45/x
3. Step 3: Cross multiply
   16,051.97x = 22,152.69 × 8,978.45
4. Step 4: Simplify right side
   16,051.97x = 198,896,708.77
5. Step 5: Solve for x
   x = 198,896,708.77/16,051.97
6. Step 6: Final answer
   x = 12,390.80