Finding the Fourth Proportional to 1,132.46, 1,698.72 and 402.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,132.46 : 1,698.72 = 402.09 : x
2. Step 2: Convert to fraction form
   1,132.46/1,698.72 = 402.09/x
3. Step 3: Cross multiply
   1,132.46x = 1,698.72 × 402.09
4. Step 4: Simplify right side
   1,132.46x = 683,037.49
5. Step 5: Solve for x
   x = 683,037.49/1,132.46
6. Step 6: Final answer
   x = 603.15