Finding the Fourth Proportional to 8,758.80, 12,086.84 and 5,403

Step by Step Solution

1. Step 1: Write the proportion equation
   8,758.80 : 12,086.84 = 5,403 : x
2. Step 2: Convert to fraction form
   8,758.80/12,086.84 = 5,403/x
3. Step 3: Cross multiply
   8,758.80x = 12,086.84 × 5,403
4. Step 4: Simplify right side
   8,758.80x = 65,305,196.52
5. Step 5: Solve for x
   x = 65,305,196.52/8,758.80
6. Step 6: Final answer
   x = 7,455.95