Finding the Fourth Proportional to 14,266.50, 19,687.85 and 7,978.88

Step by Step Solution

1. Step 1: Write the proportion equation
   14,266.50 : 19,687.85 = 7,978.88 : x
2. Step 2: Convert to fraction form
   14,266.50/19,687.85 = 7,978.88/x
3. Step 3: Cross multiply
   14,266.50x = 19,687.85 × 7,978.88
4. Step 4: Simplify right side
   14,266.50x = 157,086,854.27
5. Step 5: Solve for x
   x = 157,086,854.27/14,266.50
6. Step 6: Final answer
   x = 11,010.89