Finding the Fourth Proportional to 8,782.95, 12,116.79 and 5,758.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,782.95 : 12,116.79 = 5,758.80 : x
2. Step 2: Convert to fraction form
   8,782.95/12,116.79 = 5,758.80/x
3. Step 3: Cross multiply
   8,782.95x = 12,116.79 × 5,758.80
4. Step 4: Simplify right side
   8,782.95x = 69,778,170.25
5. Step 5: Solve for x
   x = 69,778,170.25/8,782.95
6. Step 6: Final answer
   x = 7,944.73