Finding the Fourth Proportional to 9,601.30, 13,480.70 and 9,601.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,601.30 : 13,480.70 = 9,601.30 : x
2. Step 2: Convert to fraction form
   9,601.30/13,480.70 = 9,601.30/x
3. Step 3: Cross multiply
   9,601.30x = 13,480.70 × 9,601.30
4. Step 4: Simplify right side
   9,601.30x = 129,432,244.91
5. Step 5: Solve for x
   x = 129,432,244.91/9,601.30
6. Step 6: Final answer
   x = 13,480.70