Finding the Fourth Proportional to 8,322.90, 12,487.98 and 4,422.74

Step by Step Solution

1. Step 1: Write the proportion equation
   8,322.90 : 12,487.98 = 4,422.74 : x
2. Step 2: Convert to fraction form
   8,322.90/12,487.98 = 4,422.74/x
3. Step 3: Cross multiply
   8,322.90x = 12,487.98 × 4,422.74
4. Step 4: Simplify right side
   8,322.90x = 55,231,088.67
5. Step 5: Solve for x
   x = 55,231,088.67/8,322.90
6. Step 6: Final answer
   x = 6,636.04