Finding the Fourth Proportional to 2,309.60, 3,187.94 and 1,648.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.60 : 3,187.94 = 1,648.37 : x
2. Step 2: Convert to fraction form
   2,309.60/3,187.94 = 1,648.37/x
3. Step 3: Cross multiply
   2,309.60x = 3,187.94 × 1,648.37
4. Step 4: Simplify right side
   2,309.60x = 5,254,880.48
5. Step 5: Solve for x
   x = 5,254,880.48/2,309.60
6. Step 6: Final answer
   x = 2,275.24