Finding the Fourth Proportional to 9,961.20, 13,746.68 and 5,485.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,961.20 : 13,746.68 = 5,485.04 : x
2. Step 2: Convert to fraction form
   9,961.20/13,746.68 = 5,485.04/x
3. Step 3: Cross multiply
   9,961.20x = 13,746.68 × 5,485.04
4. Step 4: Simplify right side
   9,961.20x = 75,401,089.67
5. Step 5: Solve for x
   x = 75,401,089.67/9,961.20
6. Step 6: Final answer
   x = 7,569.48