Finding the Fourth Proportional to 12,390.22, 17,095.98 and 7,086.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.22 : 17,095.98 = 7,086.82 : x
2. Step 2: Convert to fraction form
   12,390.22/17,095.98 = 7,086.82/x
3. Step 3: Cross multiply
   12,390.22x = 17,095.98 × 7,086.82
4. Step 4: Simplify right side
   12,390.22x = 121,156,132.98
5. Step 5: Solve for x
   x = 121,156,132.98/12,390.22
6. Step 6: Final answer
   x = 9,778.37