Finding the Fourth Proportional to 7,191.89, 10,785.69 and 3,240.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,191.89 : 10,785.69 = 3,240.86 : x
2. Step 2: Convert to fraction form
   7,191.89/10,785.69 = 3,240.86/x
3. Step 3: Cross multiply
   7,191.89x = 10,785.69 × 3,240.86
4. Step 4: Simplify right side
   7,191.89x = 34,954,938.26
5. Step 5: Solve for x
   x = 34,954,938.26/7,191.89
6. Step 6: Final answer
   x = 4,860.33