Finding the Fourth Proportional to 1,048.80, 1,572.53 and 501.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.80 : 1,572.53 = 501.78 : x
2. Step 2: Convert to fraction form
   1,048.80/1,572.53 = 501.78/x
3. Step 3: Cross multiply
   1,048.80x = 1,572.53 × 501.78
4. Step 4: Simplify right side
   1,048.80x = 789,061.59
5. Step 5: Solve for x
   x = 789,061.59/1,048.80
6. Step 6: Final answer
   x = 752.35