Finding the Fourth Proportional to 8,910.92, 12,296.82 and 4,931.90

Step by Step Solution

1. Step 1: Write the proportion equation
   8,910.92 : 12,296.82 = 4,931.90 : x
2. Step 2: Convert to fraction form
   8,910.92/12,296.82 = 4,931.90/x
3. Step 3: Cross multiply
   8,910.92x = 12,296.82 × 4,931.90
4. Step 4: Simplify right side
   8,910.92x = 60,646,686.56
5. Step 5: Solve for x
   x = 60,646,686.56/8,910.92
6. Step 6: Final answer
   x = 6,805.88