Finding the Fourth Proportional to 14,789.89, 20,411.24 and 8,416.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,789.89 : 20,411.24 = 8,416.76 : x
2. Step 2: Convert to fraction form
   14,789.89/20,411.24 = 8,416.76/x
3. Step 3: Cross multiply
   14,789.89x = 20,411.24 × 8,416.76
4. Step 4: Simplify right side
   14,789.89x = 171,796,526.40
5. Step 5: Solve for x
   x = 171,796,526.40/14,789.89
6. Step 6: Final answer
   x = 11,615.81