Finding the Fourth Proportional to 1,868.71, 2,802.30 and 698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,868.71 : 2,802.30 = 698.50 : x
2. Step 2: Convert to fraction form
   1,868.71/2,802.30 = 698.50/x
3. Step 3: Cross multiply
   1,868.71x = 2,802.30 × 698.50
4. Step 4: Simplify right side
   1,868.71x = 1,957,406.55
5. Step 5: Solve for x
   x = 1,957,406.55/1,868.71
6. Step 6: Final answer
   x = 1,047.46