Finding the Fourth Proportional to 8,758.17, 12,085.78 and 4,980.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,758.17 : 12,085.78 = 4,980.80 : x
2. Step 2: Convert to fraction form
   8,758.17/12,085.78 = 4,980.80/x
3. Step 3: Cross multiply
   8,758.17x = 12,085.78 × 4,980.80
4. Step 4: Simplify right side
   8,758.17x = 60,196,853.02
5. Step 5: Solve for x
   x = 60,196,853.02/8,758.17
6. Step 6: Final answer
   x = 6,873.22