Finding the Fourth Proportional to 1,275.18, 1,760.94 and 1,206.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275.18 : 1,760.94 = 1,206.15 : x
2. Step 2: Convert to fraction form
   1,275.18/1,760.94 = 1,206.15/x
3. Step 3: Cross multiply
   1,275.18x = 1,760.94 × 1,206.15
4. Step 4: Simplify right side
   1,275.18x = 2,123,957.78
5. Step 5: Solve for x
   x = 2,123,957.78/1,275.18
6. Step 6: Final answer
   x = 1,665.61