Finding the Fourth Proportional to 1,524.56, 2,287.27 and 428.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.56 : 2,287.27 = 428.93 : x
2. Step 2: Convert to fraction form
   1,524.56/2,287.27 = 428.93/x
3. Step 3: Cross multiply
   1,524.56x = 2,287.27 × 428.93
4. Step 4: Simplify right side
   1,524.56x = 981,078.72
5. Step 5: Solve for x
   x = 981,078.72/1,524.56
6. Step 6: Final answer
   x = 643.52