Finding the Fourth Proportional to 12,391.41, 17,100.66 and 7,086.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,391.41 : 17,100.66 = 7,086.22 : x
2. Step 2: Convert to fraction form
   12,391.41/17,100.66 = 7,086.22/x
3. Step 3: Cross multiply
   12,391.41x = 17,100.66 × 7,086.22
4. Step 4: Simplify right side
   12,391.41x = 121,179,038.91
5. Step 5: Solve for x
   x = 121,179,038.91/12,391.41
6. Step 6: Final answer
   x = 9,779.28