Finding the Fourth Proportional to 8,766.90, 12,098.61 and 4,990.37

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.90 : 12,098.61 = 4,990.37 : x
2. Step 2: Convert to fraction form
   8,766.90/12,098.61 = 4,990.37/x
3. Step 3: Cross multiply
   8,766.90x = 12,098.61 × 4,990.37
4. Step 4: Simplify right side
   8,766.90x = 60,376,479.89
5. Step 5: Solve for x
   x = 60,376,479.89/8,766.90
6. Step 6: Final answer
   x = 6,886.87