Finding the Fourth Proportional to 1,018.74, 1,527.83 and 402.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.74 : 1,527.83 = 402.43 : x
2. Step 2: Convert to fraction form
   1,018.74/1,527.83 = 402.43/x
3. Step 3: Cross multiply
   1,018.74x = 1,527.83 × 402.43
4. Step 4: Simplify right side
   1,018.74x = 614,838.80
5. Step 5: Solve for x
   x = 614,838.80/1,018.74
6. Step 6: Final answer
   x = 603.53