Finding the Fourth Proportional to 1,092.23, 1,508.82 and 870.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.23 : 1,508.82 = 870.89 : x
2. Step 2: Convert to fraction form
   1,092.23/1,508.82 = 870.89/x
3. Step 3: Cross multiply
   1,092.23x = 1,508.82 × 870.89
4. Step 4: Simplify right side
   1,092.23x = 1,314,016.25
5. Step 5: Solve for x
   x = 1,314,016.25/1,092.23
6. Step 6: Final answer
   x = 1,203.06