Finding the Fourth Proportional to 1,945.96, 2,686.02 and 1,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,945.96 : 2,686.02 = 1,200.15 : x
2. Step 2: Convert to fraction form
   1,945.96/2,686.02 = 1,200.15/x
3. Step 3: Cross multiply
   1,945.96x = 2,686.02 × 1,200.15
4. Step 4: Simplify right side
   1,945.96x = 3,223,626.90
5. Step 5: Solve for x
   x = 3,223,626.90/1,945.96
6. Step 6: Final answer
   x = 1,656.57