Finding the Fourth Proportional to 1,038.52, 1,433.18 and 572.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,038.52 : 1,433.18 = 572.80 : x
2. Step 2: Convert to fraction form
   1,038.52/1,433.18 = 572.80/x
3. Step 3: Cross multiply
   1,038.52x = 1,433.18 × 572.80
4. Step 4: Simplify right side
   1,038.52x = 820,925.50
5. Step 5: Solve for x
   x = 820,925.50/1,038.52
6. Step 6: Final answer
   x = 790.48