Finding the Fourth Proportional to 1,222.34, 1,832.83 and 400.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.34 : 1,832.83 = 400.55 : x
2. Step 2: Convert to fraction form
   1,222.34/1,832.83 = 400.55/x
3. Step 3: Cross multiply
   1,222.34x = 1,832.83 × 400.55
4. Step 4: Simplify right side
   1,222.34x = 734,129.89
5. Step 5: Solve for x
   x = 734,129.89/1,222.34
6. Step 6: Final answer
   x = 600.59