Finding the Fourth Proportional to 9,401.86, 12,945.02 and 7,982.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,401.86 : 12,945.02 = 7,982.74 : x
2. Step 2: Convert to fraction form
   9,401.86/12,945.02 = 7,982.74/x
3. Step 3: Cross multiply
   9,401.86x = 12,945.02 × 7,982.74
4. Step 4: Simplify right side
   9,401.86x = 103,336,728.95
5. Step 5: Solve for x
   x = 103,336,728.95/9,401.86
6. Step 6: Final answer
   x = 10,991.09