Finding the Fourth Proportional to 1,073.59, 1,610.52 and 424.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.59 : 1,610.52 = 424.18 : x
2. Step 2: Convert to fraction form
   1,073.59/1,610.52 = 424.18/x
3. Step 3: Cross multiply
   1,073.59x = 1,610.52 × 424.18
4. Step 4: Simplify right side
   1,073.59x = 683,142.32
5. Step 5: Solve for x
   x = 683,142.32/1,073.59
6. Step 6: Final answer
   x = 636.32