Finding the Fourth Proportional to 1,308.95, 1,806.61 and 749.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.95 : 1,806.61 = 749.80 : x
2. Step 2: Convert to fraction form
   1,308.95/1,806.61 = 749.80/x
3. Step 3: Cross multiply
   1,308.95x = 1,806.61 × 749.80
4. Step 4: Simplify right side
   1,308.95x = 1,354,589.89
5. Step 5: Solve for x
   x = 1,354,589.89/1,308.95
6. Step 6: Final answer
   x = 1,034.86