Finding the Fourth Proportional to 12,426.89, 17,149.58 and 7,122.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,426.89 : 17,149.58 = 7,122.73 : x
2. Step 2: Convert to fraction form
   12,426.89/17,149.58 = 7,122.73/x
3. Step 3: Cross multiply
   12,426.89x = 17,149.58 × 7,122.73
4. Step 4: Simplify right side
   12,426.89x = 122,151,827.95
5. Step 5: Solve for x
   x = 122,151,827.95/12,426.89
6. Step 6: Final answer
   x = 9,829.64