Finding the Fourth Proportional to 12,685.86, 17,501.67 and 7,961.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.86 : 17,501.67 = 7,961.94 : x
2. Step 2: Convert to fraction form
   12,685.86/17,501.67 = 7,961.94/x
3. Step 3: Cross multiply
   12,685.86x = 17,501.67 × 7,961.94
4. Step 4: Simplify right side
   12,685.86x = 139,347,246.44
5. Step 5: Solve for x
   x = 139,347,246.44/12,685.86
6. Step 6: Final answer
   x = 10,984.45