Finding the Fourth Proportional to 16,051.56, 22,151.64 and 8,978.23

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.56 : 22,151.64 = 8,978.23 : x
2. Step 2: Convert to fraction form
   16,051.56/22,151.64 = 8,978.23/x
3. Step 3: Cross multiply
   16,051.56x = 22,151.64 × 8,978.23
4. Step 4: Simplify right side
   16,051.56x = 198,882,518.80
5. Step 5: Solve for x
   x = 198,882,518.80/16,051.56
6. Step 6: Final answer
   x = 12,390.23