Finding the Fourth Proportional to 1,021.72, 1,410.18 and 602.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,021.72 : 1,410.18 = 602.32 : x
2. Step 2: Convert to fraction form
   1,021.72/1,410.18 = 602.32/x
3. Step 3: Cross multiply
   1,021.72x = 1,410.18 × 602.32
4. Step 4: Simplify right side
   1,021.72x = 849,379.62
5. Step 5: Solve for x
   x = 849,379.62/1,021.72
6. Step 6: Final answer
   x = 831.32