Finding the Fourth Proportional to 2,645.38, 3,648.81 and 1,945.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.38 : 3,648.81 = 1,945.54 : x
2. Step 2: Convert to fraction form
   2,645.38/3,648.81 = 1,945.54/x
3. Step 3: Cross multiply
   2,645.38x = 3,648.81 × 1,945.54
4. Step 4: Simplify right side
   2,645.38x = 7,098,905.81
5. Step 5: Solve for x
   x = 7,098,905.81/2,645.38
6. Step 6: Final answer
   x = 2,683.51