Finding the Fourth Proportional to 1,017.58, 1,526.42 and 432.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.58 : 1,526.42 = 432.00 : x
2. Step 2: Convert to fraction form
   1,017.58/1,526.42 = 432.00/x
3. Step 3: Cross multiply
   1,017.58x = 1,526.42 × 432.00
4. Step 4: Simplify right side
   1,017.58x = 659,403.65
5. Step 5: Solve for x
   x = 659,403.65/1,017.58
6. Step 6: Final answer
   x = 648.01