Finding the Fourth Proportional to 1,017.92, 1,527.83 and 402.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.92 : 1,527.83 = 402.05 : x
2. Step 2: Convert to fraction form
   1,017.92/1,527.83 = 402.05/x
3. Step 3: Cross multiply
   1,017.92x = 1,527.83 × 402.05
4. Step 4: Simplify right side
   1,017.92x = 614,264.05
5. Step 5: Solve for x
   x = 614,264.05/1,017.92
6. Step 6: Final answer
   x = 603.45