Finding the Fourth Proportional to 16,051.96, 22,152.54 and 8,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.96 : 22,152.54 = 8,978.50 : x
2. Step 2: Convert to fraction form
   16,051.96/22,152.54 = 8,978.50/x
3. Step 3: Cross multiply
   16,051.96x = 22,152.54 × 8,978.50
4. Step 4: Simplify right side
   16,051.96x = 198,896,580.39
5. Step 5: Solve for x
   x = 198,896,580.39/16,051.96
6. Step 6: Final answer
   x = 12,390.80