Finding the Fourth Proportional to 9,561.53, 13,201.28 and 5,981.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,561.53 : 13,201.28 = 5,981.91 : x
2. Step 2: Convert to fraction form
   9,561.53/13,201.28 = 5,981.91/x
3. Step 3: Cross multiply
   9,561.53x = 13,201.28 × 5,981.91
4. Step 4: Simplify right side
   9,561.53x = 78,968,868.84
5. Step 5: Solve for x
   x = 78,968,868.84/9,561.53
6. Step 6: Final answer
   x = 8,259.02