Finding the Fourth Proportional to 1,147.83, 1,722.15 and 531.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.83 : 1,722.15 = 531.57 : x
2. Step 2: Convert to fraction form
   1,147.83/1,722.15 = 531.57/x
3. Step 3: Cross multiply
   1,147.83x = 1,722.15 × 531.57
4. Step 4: Simplify right side
   1,147.83x = 915,443.28
5. Step 5: Solve for x
   x = 915,443.28/1,147.83
6. Step 6: Final answer
   x = 797.54