Finding the Fourth Proportional to 14,978.50, 20,670.33 and 8,354.50

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.50 : 20,670.33 = 8,354.50 : x
2. Step 2: Convert to fraction form
   14,978.50/20,670.33 = 8,354.50/x
3. Step 3: Cross multiply
   14,978.50x = 20,670.33 × 8,354.50
4. Step 4: Simplify right side
   14,978.50x = 172,690,271.99
5. Step 5: Solve for x
   x = 172,690,271.99/14,978.50
6. Step 6: Final answer
   x = 11,529.21