Finding the Fourth Proportional to 1,191.18, 1,786.23 and 801.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.18 : 1,786.23 = 801.57 : x
2. Step 2: Convert to fraction form
   1,191.18/1,786.23 = 801.57/x
3. Step 3: Cross multiply
   1,191.18x = 1,786.23 × 801.57
4. Step 4: Simplify right side
   1,191.18x = 1,431,788.38
5. Step 5: Solve for x
   x = 1,431,788.38/1,191.18
6. Step 6: Final answer
   x = 1,201.99