Finding the Fourth Proportional to 9,947.58, 14,980.61 and 8,664.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,947.58 : 14,980.61 = 8,664.54 : x
2. Step 2: Convert to fraction form
   9,947.58/14,980.61 = 8,664.54/x
3. Step 3: Cross multiply
   9,947.58x = 14,980.61 × 8,664.54
4. Step 4: Simplify right side
   9,947.58x = 129,800,051.25
5. Step 5: Solve for x
   x = 129,800,051.25/9,947.58
6. Step 6: Final answer
   x = 13,048.40