Finding the Fourth Proportional to 934.14, 1,401.69 and 386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   934.14 : 1,401.69 = 386.72 : x
2. Step 2: Convert to fraction form
   934.14/1,401.69 = 386.72/x
3. Step 3: Cross multiply
   934.14x = 1,401.69 × 386.72
4. Step 4: Simplify right side
   934.14x = 542,061.56
5. Step 5: Solve for x
   x = 542,061.56/934.14
6. Step 6: Final answer
   x = 580.28