Finding the Fourth Proportional to 22,335.90, 30,824.18 and 12,644.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,335.90 : 30,824.18 = 12,644.60 : x
2. Step 2: Convert to fraction form
   22,335.90/30,824.18 = 12,644.60/x
3. Step 3: Cross multiply
   22,335.90x = 30,824.18 × 12,644.60
4. Step 4: Simplify right side
   22,335.90x = 389,759,426.43
5. Step 5: Solve for x
   x = 389,759,426.43/22,335.90
6. Step 6: Final answer
   x = 17,449.91