Finding the Fourth Proportional to 16,051.82, 22,151.14 and 8,978.90

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.82 : 22,151.14 = 8,978.90 : x
2. Step 2: Convert to fraction form
   16,051.82/22,151.14 = 8,978.90/x
3. Step 3: Cross multiply
   16,051.82x = 22,151.14 × 8,978.90
4. Step 4: Simplify right side
   16,051.82x = 198,892,737.74
5. Step 5: Solve for x
   x = 198,892,737.74/16,051.82
6. Step 6: Final answer
   x = 12,390.67