Finding the Fourth Proportional to 1,038.56, 1,433.10 and 572.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.56 : 1,433.10 = 572.72 : x
2. Step 2: Convert to fraction form
   1,038.56/1,433.10 = 572.72/x
3. Step 3: Cross multiply
   1,038.56x = 1,433.10 × 572.72
4. Step 4: Simplify right side
   1,038.56x = 820,765.03
5. Step 5: Solve for x
   x = 820,765.03/1,038.56
6. Step 6: Final answer
   x = 790.29