Finding the Fourth Proportional to 16,051.94, 22,152.96 and 8,978.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,051.94 : 22,152.96 = 8,978.78 : x
2. Step 2: Convert to fraction form
   16,051.94/22,152.96 = 8,978.78/x
3. Step 3: Cross multiply
   16,051.94x = 22,152.96 × 8,978.78
4. Step 4: Simplify right side
   16,051.94x = 198,906,554.19
5. Step 5: Solve for x
   x = 198,906,554.19/16,051.94
6. Step 6: Final answer
   x = 12,391.43