Finding the Fourth Proportional to 8,287.86, 12,430.17 and 3,092.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,287.86 : 12,430.17 = 3,092.70 : x
2. Step 2: Convert to fraction form
   8,287.86/12,430.17 = 3,092.70/x
3. Step 3: Cross multiply
   8,287.86x = 12,430.17 × 3,092.70
4. Step 4: Simplify right side
   8,287.86x = 38,442,786.76
5. Step 5: Solve for x
   x = 38,442,786.76/8,287.86
6. Step 6: Final answer
   x = 4,638.45