Finding the Fourth Proportional to 3,931.83, 5,423.52 and 2,605.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.83 : 5,423.52 = 2,605.05 : x
2. Step 2: Convert to fraction form
   3,931.83/5,423.52 = 2,605.05/x
3. Step 3: Cross multiply
   3,931.83x = 5,423.52 × 2,605.05
4. Step 4: Simplify right side
   3,931.83x = 14,128,540.78
5. Step 5: Solve for x
   x = 14,128,540.78/3,931.83
6. Step 6: Final answer
   x = 3,593.38