Finding the Fourth Proportional to 1,060.33, 1,581.55 and 999.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,060.33 : 1,581.55 = 999.37 : x
2. Step 2: Convert to fraction form
   1,060.33/1,581.55 = 999.37/x
3. Step 3: Cross multiply
   1,060.33x = 1,581.55 × 999.37
4. Step 4: Simplify right side
   1,060.33x = 1,580,545.72
5. Step 5: Solve for x
   x = 1,580,545.72/1,060.33
6. Step 6: Final answer
   x = 1,490.62