Finding the Fourth Proportional to 1,483.28, 2,224.89 and 387.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.28 : 2,224.89 = 387.62 : x
2. Step 2: Convert to fraction form
   1,483.28/2,224.89 = 387.62/x
3. Step 3: Cross multiply
   1,483.28x = 2,224.89 × 387.62
4. Step 4: Simplify right side
   1,483.28x = 862,411.86
5. Step 5: Solve for x
   x = 862,411.86/1,483.28
6. Step 6: Final answer
   x = 581.42