Finding the Fourth Proportional to 1,759.81, 2,640.33 and 1,177.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,759.81 : 2,640.33 = 1,177.15 : x
2. Step 2: Convert to fraction form
   1,759.81/2,640.33 = 1,177.15/x
3. Step 3: Cross multiply
   1,759.81x = 2,640.33 × 1,177.15
4. Step 4: Simplify right side
   1,759.81x = 3,108,064.46
5. Step 5: Solve for x
   x = 3,108,064.46/1,759.81
6. Step 6: Final answer
   x = 1,766.14