Finding the Fourth Proportional to 9,760.68, 14,640.72 and 5,079.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,760.68 : 14,640.72 = 5,079.12 : x
2. Step 2: Convert to fraction form
   9,760.68/14,640.72 = 5,079.12/x
3. Step 3: Cross multiply
   9,760.68x = 14,640.72 × 5,079.12
4. Step 4: Simplify right side
   9,760.68x = 74,361,973.77
5. Step 5: Solve for x
   x = 74,361,973.77/9,760.68
6. Step 6: Final answer
   x = 7,618.52