Finding the Fourth Proportional to 8,290.38, 11,436.86 and 4,931.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,290.38 : 11,436.86 = 4,931.31 : x
2. Step 2: Convert to fraction form
   8,290.38/11,436.86 = 4,931.31/x
3. Step 3: Cross multiply
   8,290.38x = 11,436.86 × 4,931.31
4. Step 4: Simplify right side
   8,290.38x = 56,398,714.41
5. Step 5: Solve for x
   x = 56,398,714.41/8,290.38
6. Step 6: Final answer
   x = 6,802.91