Finding the Fourth Proportional to 9,391.32, 12,959.64 and 5,616.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,391.32 : 12,959.64 = 5,616.56 : x
2. Step 2: Convert to fraction form
   9,391.32/12,959.64 = 5,616.56/x
3. Step 3: Cross multiply
   9,391.32x = 12,959.64 × 5,616.56
4. Step 4: Simplify right side
   9,391.32x = 72,788,595.64
5. Step 5: Solve for x
   x = 72,788,595.64/9,391.32
6. Step 6: Final answer
   x = 7,750.62