Finding the Fourth Proportional to 1,191.57, 1,788.12 and 801.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.57 : 1,788.12 = 801.72 : x
2. Step 2: Convert to fraction form
   1,191.57/1,788.12 = 801.72/x
3. Step 3: Cross multiply
   1,191.57x = 1,788.12 × 801.72
4. Step 4: Simplify right side
   1,191.57x = 1,433,571.57
5. Step 5: Solve for x
   x = 1,433,571.57/1,191.57
6. Step 6: Final answer
   x = 1,203.09