Finding the Fourth Proportional to 11,347.89, 17,007.15 and 8,402.73

Step by Step Solution

1. Step 1: Write the proportion equation
   11,347.89 : 17,007.15 = 8,402.73 : x
2. Step 2: Convert to fraction form
   11,347.89/17,007.15 = 8,402.73/x
3. Step 3: Cross multiply
   11,347.89x = 17,007.15 × 8,402.73
4. Step 4: Simplify right side
   11,347.89x = 142,906,489.52
5. Step 5: Solve for x
   x = 142,906,489.52/11,347.89
6. Step 6: Final answer
   x = 12,593.22