Finding the Fourth Proportional to 1,868.31, 2,801.57 and 698.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.31 : 2,801.57 = 698.27 : x
2. Step 2: Convert to fraction form
   1,868.31/2,801.57 = 698.27/x
3. Step 3: Cross multiply
   1,868.31x = 2,801.57 × 698.27
4. Step 4: Simplify right side
   1,868.31x = 1,956,234.78
5. Step 5: Solve for x
   x = 1,956,234.78/1,868.31
6. Step 6: Final answer
   x = 1,047.06