Finding the Fourth Proportional to 1,019.99, 1,407.27 and 577.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.99 : 1,407.27 = 577.73 : x
2. Step 2: Convert to fraction form
   1,019.99/1,407.27 = 577.73/x
3. Step 3: Cross multiply
   1,019.99x = 1,407.27 × 577.73
4. Step 4: Simplify right side
   1,019.99x = 813,027.78
5. Step 5: Solve for x
   x = 813,027.78/1,019.99
6. Step 6: Final answer
   x = 797.09