Finding the Fourth Proportional to 1,092.83, 1,508.42 and 720.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,092.83 : 1,508.42 = 720.09 : x
2. Step 2: Convert to fraction form
   1,092.83/1,508.42 = 720.09/x
3. Step 3: Cross multiply
   1,092.83x = 1,508.42 × 720.09
4. Step 4: Simplify right side
   1,092.83x = 1,086,199.96
5. Step 5: Solve for x
   x = 1,086,199.96/1,092.83
6. Step 6: Final answer
   x = 993.94