Finding the Fourth Proportional to 1,353.16, 1,868.27 and 1,260.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.16 : 1,868.27 = 1,260.15 : x
2. Step 2: Convert to fraction form
   1,353.16/1,868.27 = 1,260.15/x
3. Step 3: Cross multiply
   1,353.16x = 1,868.27 × 1,260.15
4. Step 4: Simplify right side
   1,353.16x = 2,354,300.44
5. Step 5: Solve for x
   x = 2,354,300.44/1,353.16
6. Step 6: Final answer
   x = 1,739.85