Finding the Fourth Proportional to 3,802.52, 5,267.78 and 3,711.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.52 : 5,267.78 = 3,711.80 : x
2. Step 2: Convert to fraction form
   3,802.52/5,267.78 = 3,711.80/x
3. Step 3: Cross multiply
   3,802.52x = 5,267.78 × 3,711.80
4. Step 4: Simplify right side
   3,802.52x = 19,552,945.80
5. Step 5: Solve for x
   x = 19,552,945.80/3,802.52
6. Step 6: Final answer
   x = 5,142.10