Finding the Fourth Proportional to 1,308.83, 1,963.56 and 384.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.83 : 1,963.56 = 384.42 : x
2. Step 2: Convert to fraction form
   1,308.83/1,963.56 = 384.42/x
3. Step 3: Cross multiply
   1,308.83x = 1,963.56 × 384.42
4. Step 4: Simplify right side
   1,308.83x = 754,831.74
5. Step 5: Solve for x
   x = 754,831.74/1,308.83
6. Step 6: Final answer
   x = 576.72