Finding the Fourth Proportional to 1,451.31, 2,175.17 and 757.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.31 : 2,175.17 = 757.62 : x
2. Step 2: Convert to fraction form
   1,451.31/2,175.17 = 757.62/x
3. Step 3: Cross multiply
   1,451.31x = 2,175.17 × 757.62
4. Step 4: Simplify right side
   1,451.31x = 1,647,948.51
5. Step 5: Solve for x
   x = 1,647,948.51/1,451.31
6. Step 6: Final answer
   x = 1,135.49