Finding the Fourth Proportional to 1,018.67, 1,527.89 and 691.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.67 : 1,527.89 = 691.71 : x
2. Step 2: Convert to fraction form
   1,018.67/1,527.89 = 691.71/x
3. Step 3: Cross multiply
   1,018.67x = 1,527.89 × 691.71
4. Step 4: Simplify right side
   1,018.67x = 1,056,849.15
5. Step 5: Solve for x
   x = 1,056,849.15/1,018.67
6. Step 6: Final answer
   x = 1,037.48