Finding the Fourth Proportional to 16,051.42, 22,151.10 and 8,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.42 : 22,151.10 = 8,978.50 : x
2. Step 2: Convert to fraction form
   16,051.42/22,151.10 = 8,978.50/x
3. Step 3: Cross multiply
   16,051.42x = 22,151.10 × 8,978.50
4. Step 4: Simplify right side
   16,051.42x = 198,883,651.35
5. Step 5: Solve for x
   x = 198,883,651.35/16,051.42
6. Step 6: Final answer
   x = 12,390.41