Finding the Fourth Proportional to 14,978.76, 20,667.54 and 8,607.30

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.76 : 20,667.54 = 8,607.30 : x
2. Step 2: Convert to fraction form
   14,978.76/20,667.54 = 8,607.30/x
3. Step 3: Cross multiply
   14,978.76x = 20,667.54 × 8,607.30
4. Step 4: Simplify right side
   14,978.76x = 177,891,717.04
5. Step 5: Solve for x
   x = 177,891,717.04/14,978.76
6. Step 6: Final answer
   x = 11,876.26