Finding the Fourth Proportional to 8,759.81, 12,091.47 and 5,401.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,759.81 : 12,091.47 = 5,401.15 : x
2. Step 2: Convert to fraction form
   8,759.81/12,091.47 = 5,401.15/x
3. Step 3: Cross multiply
   8,759.81x = 12,091.47 × 5,401.15
4. Step 4: Simplify right side
   8,759.81x = 65,307,782.73
5. Step 5: Solve for x
   x = 65,307,782.73/8,759.81
6. Step 6: Final answer
   x = 7,455.39