Finding the Fourth Proportional to 1,017.77, 1,404.54 and 575.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.77 : 1,404.54 = 575.51 : x
2. Step 2: Convert to fraction form
   1,017.77/1,404.54 = 575.51/x
3. Step 3: Cross multiply
   1,017.77x = 1,404.54 × 575.51
4. Step 4: Simplify right side
   1,017.77x = 808,319.79
5. Step 5: Solve for x
   x = 808,319.79/1,017.77
6. Step 6: Final answer
   x = 794.21