Finding the Fourth Proportional to 14,978.08, 20,669.61 and 8,263.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,978.08 : 20,669.61 = 8,263.76 : x
2. Step 2: Convert to fraction form
   14,978.08/20,669.61 = 8,263.76/x
3. Step 3: Cross multiply
   14,978.08x = 20,669.61 × 8,263.76
4. Step 4: Simplify right side
   14,978.08x = 170,808,696.33
5. Step 5: Solve for x
   x = 170,808,696.33/14,978.08
6. Step 6: Final answer
   x = 11,403.91