Finding the Fourth Proportional to 1,559.34, 2,338.83 and 405.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.34 : 2,338.83 = 405.18 : x
2. Step 2: Convert to fraction form
   1,559.34/2,338.83 = 405.18/x
3. Step 3: Cross multiply
   1,559.34x = 2,338.83 × 405.18
4. Step 4: Simplify right side
   1,559.34x = 947,647.14
5. Step 5: Solve for x
   x = 947,647.14/1,559.34
6. Step 6: Final answer
   x = 607.72