Finding the Fourth Proportional to 1,223.92, 1,835.82 and 402.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.92 : 1,835.82 = 402.09 : x
2. Step 2: Convert to fraction form
   1,223.92/1,835.82 = 402.09/x
3. Step 3: Cross multiply
   1,223.92x = 1,835.82 × 402.09
4. Step 4: Simplify right side
   1,223.92x = 738,164.86
5. Step 5: Solve for x
   x = 738,164.86/1,223.92
6. Step 6: Final answer
   x = 603.12