Finding the Fourth Proportional to 16,051.79, 22,152.35 and 8,978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.79 : 22,152.35 = 8,978.06 : x
2. Step 2: Convert to fraction form
   16,051.79/22,152.35 = 8,978.06/x
3. Step 3: Cross multiply
   16,051.79x = 22,152.35 × 8,978.06
4. Step 4: Simplify right side
   16,051.79x = 198,885,127.44
5. Step 5: Solve for x
   x = 198,885,127.44/16,051.79
6. Step 6: Final answer
   x = 12,390.21