Finding the Fourth Proportional to 16,053.78, 22,153.18 and 8,978.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,053.78 : 22,153.18 = 8,978.98 : x
2. Step 2: Convert to fraction form
   16,053.78/22,153.18 = 8,978.98/x
3. Step 3: Cross multiply
   16,053.78x = 22,153.18 × 8,978.98
4. Step 4: Simplify right side
   16,053.78x = 198,912,960.16
5. Step 5: Solve for x
   x = 198,912,960.16/16,053.78
6. Step 6: Final answer
   x = 12,390.41