Finding the Fourth Proportional to 1,010.68, 1,392.54 and 757.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.68 : 1,392.54 = 757.57 : x
2. Step 2: Convert to fraction form
   1,010.68/1,392.54 = 757.57/x
3. Step 3: Cross multiply
   1,010.68x = 1,392.54 × 757.57
4. Step 4: Simplify right side
   1,010.68x = 1,054,946.53
5. Step 5: Solve for x
   x = 1,054,946.53/1,010.68
6. Step 6: Final answer
   x = 1,043.80