Finding the Fourth Proportional to 9,947.08, 14,979.85 and 8,664.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.08 : 14,979.85 = 8,664.04 : x
2. Step 2: Convert to fraction form
   9,947.08/14,979.85 = 8,664.04/x
3. Step 3: Cross multiply
   9,947.08x = 14,979.85 × 8,664.04
4. Step 4: Simplify right side
   9,947.08x = 129,786,019.59
5. Step 5: Solve for x
   x = 129,786,019.59/9,947.08
6. Step 6: Final answer
   x = 13,047.65