Finding the Fourth Proportional to 1,308.42, 1,962.72 and 384.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.42 : 1,962.72 = 384.06 : x
2. Step 2: Convert to fraction form
   1,308.42/1,962.72 = 384.06/x
3. Step 3: Cross multiply
   1,308.42x = 1,962.72 × 384.06
4. Step 4: Simplify right side
   1,308.42x = 753,802.24
5. Step 5: Solve for x
   x = 753,802.24/1,308.42
6. Step 6: Final answer
   x = 576.12