Finding the Fourth Proportional to 2,650.50, 3,646.89 and 2,431.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.50 : 3,646.89 = 2,431.80 : x
2. Step 2: Convert to fraction form
   2,650.50/3,646.89 = 2,431.80/x
3. Step 3: Cross multiply
   2,650.50x = 3,646.89 × 2,431.80
4. Step 4: Simplify right side
   2,650.50x = 8,868,507.10
5. Step 5: Solve for x
   x = 8,868,507.10/2,650.50
6. Step 6: Final answer
   x = 3,345.98