Finding the Fourth Proportional to 1,383.39, 2,073.56 and 561.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.39 : 2,073.56 = 561.42 : x
2. Step 2: Convert to fraction form
   1,383.39/2,073.56 = 561.42/x
3. Step 3: Cross multiply
   1,383.39x = 2,073.56 × 561.42
4. Step 4: Simplify right side
   1,383.39x = 1,164,135.25
5. Step 5: Solve for x
   x = 1,164,135.25/1,383.39
6. Step 6: Final answer
   x = 841.51