Finding the Fourth Proportional to 1,427.61, 1,970.25 and 868.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.61 : 1,970.25 = 868.23 : x
2. Step 2: Convert to fraction form
   1,427.61/1,970.25 = 868.23/x
3. Step 3: Cross multiply
   1,427.61x = 1,970.25 × 868.23
4. Step 4: Simplify right side
   1,427.61x = 1,710,630.16
5. Step 5: Solve for x
   x = 1,710,630.16/1,427.61
6. Step 6: Final answer
   x = 1,198.25