Finding the Fourth Proportional to 1,038.21, 1,432.71 and 572.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.21 : 1,432.71 = 572.46 : x
2. Step 2: Convert to fraction form
   1,038.21/1,432.71 = 572.46/x
3. Step 3: Cross multiply
   1,038.21x = 1,432.71 × 572.46
4. Step 4: Simplify right side
   1,038.21x = 820,169.17
5. Step 5: Solve for x
   x = 820,169.17/1,038.21
6. Step 6: Final answer
   x = 789.98