Finding the Fourth Proportional to 16,051.68, 22,151.70 and 8,978.04

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.68 : 22,151.70 = 8,978.04 : x
2. Step 2: Convert to fraction form
   16,051.68/22,151.70 = 8,978.04/x
3. Step 3: Cross multiply
   16,051.68x = 22,151.70 × 8,978.04
4. Step 4: Simplify right side
   16,051.68x = 198,878,848.67
5. Step 5: Solve for x
   x = 198,878,848.67/16,051.68
6. Step 6: Final answer
   x = 12,389.91