Finding the Fourth Proportional to 9,840.56, 13,598.52 and 7,761.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,840.56 : 13,598.52 = 7,761.20 : x
2. Step 2: Convert to fraction form
   9,840.56/13,598.52 = 7,761.20/x
3. Step 3: Cross multiply
   9,840.56x = 13,598.52 × 7,761.20
4. Step 4: Simplify right side
   9,840.56x = 105,540,833.42
5. Step 5: Solve for x
   x = 105,540,833.42/9,840.56
6. Step 6: Final answer
   x = 10,725.08