Finding the Fourth Proportional to 9,608.95, 13,258.65 and 5,417.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,608.95 : 13,258.65 = 5,417.20 : x
2. Step 2: Convert to fraction form
   9,608.95/13,258.65 = 5,417.20/x
3. Step 3: Cross multiply
   9,608.95x = 13,258.65 × 5,417.20
4. Step 4: Simplify right side
   9,608.95x = 71,824,758.78
5. Step 5: Solve for x
   x = 71,824,758.78/9,608.95
6. Step 6: Final answer
   x = 7,474.78