Finding the Fourth Proportional to 2,309.10, 3,187.25 and 1,647.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.10 : 3,187.25 = 1,647.87 : x
2. Step 2: Convert to fraction form
   2,309.10/3,187.25 = 1,647.87/x
3. Step 3: Cross multiply
   2,309.10x = 3,187.25 × 1,647.87
4. Step 4: Simplify right side
   2,309.10x = 5,252,173.66
5. Step 5: Solve for x
   x = 5,252,173.66/2,309.10
6. Step 6: Final answer
   x = 2,274.55