Finding the Fourth Proportional to 1,038.02, 1,556.82 and 380.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.02 : 1,556.82 = 380.30 : x
2. Step 2: Convert to fraction form
   1,038.02/1,556.82 = 380.30/x
3. Step 3: Cross multiply
   1,038.02x = 1,556.82 × 380.30
4. Step 4: Simplify right side
   1,038.02x = 592,050.86
5. Step 5: Solve for x
   x = 592,050.86/1,038.02
6. Step 6: Final answer
   x = 570.37