Finding the Fourth Proportional to 1,038.69, 1,558.17 and 389.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.69 : 1,558.17 = 389.34 : x
2. Step 2: Convert to fraction form
   1,038.69/1,558.17 = 389.34/x
3. Step 3: Cross multiply
   1,038.69x = 1,558.17 × 389.34
4. Step 4: Simplify right side
   1,038.69x = 606,657.91
5. Step 5: Solve for x
   x = 606,657.91/1,038.69
6. Step 6: Final answer
   x = 584.06