Finding the Fourth Proportional to 1,007.69, 1,389.35 and 757.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.69 : 1,389.35 = 757.94 : x
2. Step 2: Convert to fraction form
   1,007.69/1,389.35 = 757.94/x
3. Step 3: Cross multiply
   1,007.69x = 1,389.35 × 757.94
4. Step 4: Simplify right side
   1,007.69x = 1,053,038.89
5. Step 5: Solve for x
   x = 1,053,038.89/1,007.69
6. Step 6: Final answer
   x = 1,045.01