Finding the Fourth Proportional to 1,017.89, 1,527.42 and 432.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.89 : 1,527.42 = 432.86 : x
2. Step 2: Convert to fraction form
   1,017.89/1,527.42 = 432.86/x
3. Step 3: Cross multiply
   1,017.89x = 1,527.42 × 432.86
4. Step 4: Simplify right side
   1,017.89x = 661,151.38
5. Step 5: Solve for x
   x = 661,151.38/1,017.89
6. Step 6: Final answer
   x = 649.53