Finding the Fourth Proportional to 1,016.61, 1,524.50 and 400.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.61 : 1,524.50 = 400.23 : x
2. Step 2: Convert to fraction form
   1,016.61/1,524.50 = 400.23/x
3. Step 3: Cross multiply
   1,016.61x = 1,524.50 × 400.23
4. Step 4: Simplify right side
   1,016.61x = 610,148.63
5. Step 5: Solve for x
   x = 610,148.63/1,016.61
6. Step 6: Final answer
   x = 600.18