Finding the Fourth Proportional to 8,780.61, 12,116.61 and 4,800.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.61 : 12,116.61 = 4,800.88 : x
2. Step 2: Convert to fraction form
   8,780.61/12,116.61 = 4,800.88/x
3. Step 3: Cross multiply
   8,780.61x = 12,116.61 × 4,800.88
4. Step 4: Simplify right side
   8,780.61x = 58,170,360.33
5. Step 5: Solve for x
   x = 58,170,360.33/8,780.61
6. Step 6: Final answer
   x = 6,624.87