Finding the Fourth Proportional to 1,017.49, 1,527.05 and 401.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.49 : 1,527.05 = 401.35 : x
2. Step 2: Convert to fraction form
   1,017.49/1,527.05 = 401.35/x
3. Step 3: Cross multiply
   1,017.49x = 1,527.05 × 401.35
4. Step 4: Simplify right side
   1,017.49x = 612,881.52
5. Step 5: Solve for x
   x = 612,881.52/1,017.49
6. Step 6: Final answer
   x = 602.35