Finding the Fourth Proportional to 1,017.07, 1,403.55 and 575.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.07 : 1,403.55 = 575.05 : x
2. Step 2: Convert to fraction form
   1,017.07/1,403.55 = 575.05/x
3. Step 3: Cross multiply
   1,017.07x = 1,403.55 × 575.05
4. Step 4: Simplify right side
   1,017.07x = 807,111.43
5. Step 5: Solve for x
   x = 807,111.43/1,017.07
6. Step 6: Final answer
   x = 793.57