Finding the Fourth Proportional to 1,317.33, 1,817.91 and 757.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.33 : 1,817.91 = 757.76 : x
2. Step 2: Convert to fraction form
   1,317.33/1,817.91 = 757.76/x
3. Step 3: Cross multiply
   1,317.33x = 1,817.91 × 757.76
4. Step 4: Simplify right side
   1,317.33x = 1,377,530.39
5. Step 5: Solve for x
   x = 1,377,530.39/1,317.33
6. Step 6: Final answer
   x = 1,045.70