Finding the Fourth Proportional to 8,819.67, 12,171.06 and 4,840.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,819.67 : 12,171.06 = 4,840.80 : x
2. Step 2: Convert to fraction form
   8,819.67/12,171.06 = 4,840.80/x
3. Step 3: Cross multiply
   8,819.67x = 12,171.06 × 4,840.80
4. Step 4: Simplify right side
   8,819.67x = 58,917,667.25
5. Step 5: Solve for x
   x = 58,917,667.25/8,819.67
6. Step 6: Final answer
   x = 6,680.26