Finding the Fourth Proportional to 1,219.37, 1,828.59 and 397.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,219.37 : 1,828.59 = 397.43 : x
2. Step 2: Convert to fraction form
   1,219.37/1,828.59 = 397.43/x
3. Step 3: Cross multiply
   1,219.37x = 1,828.59 × 397.43
4. Step 4: Simplify right side
   1,219.37x = 726,736.52
5. Step 5: Solve for x
   x = 726,736.52/1,219.37
6. Step 6: Final answer
   x = 595.99