Finding the Fourth Proportional to 9,772.96, 13,487.40 and 5,581.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,772.96 : 13,487.40 = 5,581.12 : x
2. Step 2: Convert to fraction form
   9,772.96/13,487.40 = 5,581.12/x
3. Step 3: Cross multiply
   9,772.96x = 13,487.40 × 5,581.12
4. Step 4: Simplify right side
   9,772.96x = 75,274,797.89
5. Step 5: Solve for x
   x = 75,274,797.89/9,772.96
6. Step 6: Final answer
   x = 7,702.35