Finding the Fourth Proportional to 16,276.80, 22,460.76 and 10,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,276.80 : 22,460.76 = 10,978.80 : x
2. Step 2: Convert to fraction form
   16,276.80/22,460.76 = 10,978.80/x
3. Step 3: Cross multiply
   16,276.80x = 22,460.76 × 10,978.80
4. Step 4: Simplify right side
   16,276.80x = 246,592,191.89
5. Step 5: Solve for x
   x = 246,592,191.89/16,276.80
6. Step 6: Final answer
   x = 15,149.92