Finding the Fourth Proportional to 1,152.50, 1,727.19 and 631.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.50 : 1,727.19 = 631.72 : x
2. Step 2: Convert to fraction form
   1,152.50/1,727.19 = 631.72/x
3. Step 3: Cross multiply
   1,152.50x = 1,727.19 × 631.72
4. Step 4: Simplify right side
   1,152.50x = 1,091,100.47
5. Step 5: Solve for x
   x = 1,091,100.47/1,152.50
6. Step 6: Final answer
   x = 946.72