Finding the Fourth Proportional to 1,010.57, 1,510.10 and 758.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.57 : 1,510.10 = 758.76 : x
2. Step 2: Convert to fraction form
   1,010.57/1,510.10 = 758.76/x
3. Step 3: Cross multiply
   1,010.57x = 1,510.10 × 758.76
4. Step 4: Simplify right side
   1,010.57x = 1,145,799.68
5. Step 5: Solve for x
   x = 1,145,799.68/1,010.57
6. Step 6: Final answer
   x = 1,133.82