Finding the Fourth Proportional to 1,662.12, 2,489.94 and 1,275.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.12 : 2,489.94 = 1,275.48 : x
2. Step 2: Convert to fraction form
   1,662.12/2,489.94 = 1,275.48/x
3. Step 3: Cross multiply
   1,662.12x = 2,489.94 × 1,275.48
4. Step 4: Simplify right side
   1,662.12x = 3,175,868.67
5. Step 5: Solve for x
   x = 3,175,868.67/1,662.12
6. Step 6: Final answer
   x = 1,910.73