Finding the Fourth Proportional to 1,191.27, 1,788.06 and 575.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.27 : 1,788.06 = 575.42 : x
2. Step 2: Convert to fraction form
   1,191.27/1,788.06 = 575.42/x
3. Step 3: Cross multiply
   1,191.27x = 1,788.06 × 575.42
4. Step 4: Simplify right side
   1,191.27x = 1,028,876.54
5. Step 5: Solve for x
   x = 1,028,876.54/1,191.27
6. Step 6: Final answer
   x = 863.68