Finding the Fourth Proportional to 1,162.56, 1,744.61 and 432.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.56 : 1,744.61 = 432.15 : x
2. Step 2: Convert to fraction form
   1,162.56/1,744.61 = 432.15/x
3. Step 3: Cross multiply
   1,162.56x = 1,744.61 × 432.15
4. Step 4: Simplify right side
   1,162.56x = 753,922.33
5. Step 5: Solve for x
   x = 753,922.33/1,162.56
6. Step 6: Final answer
   x = 648.50