Finding the Fourth Proportional to 16,051.77, 22,151.48 and 8,978.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.77 : 22,151.48 = 8,978.31 : x
2. Step 2: Convert to fraction form
   16,051.77/22,151.48 = 8,978.31/x
3. Step 3: Cross multiply
   16,051.77x = 22,151.48 × 8,978.31
4. Step 4: Simplify right side
   16,051.77x = 198,882,809.51
5. Step 5: Solve for x
   x = 198,882,809.51/16,051.77
6. Step 6: Final answer
   x = 12,390.09