Finding the Fourth Proportional to 1,484.96, 2,227.43 and 389.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,484.96 : 2,227.43 = 389.31 : x
2. Step 2: Convert to fraction form
   1,484.96/2,227.43 = 389.31/x
3. Step 3: Cross multiply
   1,484.96x = 2,227.43 × 389.31
4. Step 4: Simplify right side
   1,484.96x = 867,158.83
5. Step 5: Solve for x
   x = 867,158.83/1,484.96
6. Step 6: Final answer
   x = 583.96