Finding the Fourth Proportional to 1,152.15, 1,725.46 and 631.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.15 : 1,725.46 = 631.38 : x
2. Step 2: Convert to fraction form
   1,152.15/1,725.46 = 631.38/x
3. Step 3: Cross multiply
   1,152.15x = 1,725.46 × 631.38
4. Step 4: Simplify right side
   1,152.15x = 1,089,420.93
5. Step 5: Solve for x
   x = 1,089,420.93/1,152.15
6. Step 6: Final answer
   x = 945.55