Finding the Fourth Proportional to 1,016.84, 1,525.78 and 691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.84 : 1,525.78 = 691.56 : x
2. Step 2: Convert to fraction form
   1,016.84/1,525.78 = 691.56/x
3. Step 3: Cross multiply
   1,016.84x = 1,525.78 × 691.56
4. Step 4: Simplify right side
   1,016.84x = 1,055,168.42
5. Step 5: Solve for x
   x = 1,055,168.42/1,016.84
6. Step 6: Final answer
   x = 1,037.69