Finding the Fourth Proportional to 1,018.56, 1,527.48 and 402.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.56 : 1,527.48 = 402.42 : x
2. Step 2: Convert to fraction form
   1,018.56/1,527.48 = 402.42/x
3. Step 3: Cross multiply
   1,018.56x = 1,527.48 × 402.42
4. Step 4: Simplify right side
   1,018.56x = 614,688.50
5. Step 5: Solve for x
   x = 614,688.50/1,018.56
6. Step 6: Final answer
   x = 603.49