Finding the Fourth Proportional to 8,188.80, 12,258.90 and 4,900.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,188.80 : 12,258.90 = 4,900.20 : x
2. Step 2: Convert to fraction form
   8,188.80/12,258.90 = 4,900.20/x
3. Step 3: Cross multiply
   8,188.80x = 12,258.90 × 4,900.20
4. Step 4: Simplify right side
   8,188.80x = 60,071,061.78
5. Step 5: Solve for x
   x = 60,071,061.78/8,188.80
6. Step 6: Final answer
   x = 7,335.76