Finding the Fourth Proportional to 8,106.06, 12,162.72 and 4,990.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,106.06 : 12,162.72 = 4,990.80 : x
2. Step 2: Convert to fraction form
   8,106.06/12,162.72 = 4,990.80/x
3. Step 3: Cross multiply
   8,106.06x = 12,162.72 × 4,990.80
4. Step 4: Simplify right side
   8,106.06x = 60,701,702.98
5. Step 5: Solve for x
   x = 60,701,702.98/8,106.06
6. Step 6: Final answer
   x = 7,488.43