Finding the Fourth Proportional to 3,877.83, 5,816.54 and 1,280.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,877.83 : 5,816.54 = 1,280.67 : x
2. Step 2: Convert to fraction form
   3,877.83/5,816.54 = 1,280.67/x
3. Step 3: Cross multiply
   3,877.83x = 5,816.54 × 1,280.67
4. Step 4: Simplify right side
   3,877.83x = 7,449,061.88
5. Step 5: Solve for x
   x = 7,449,061.88/3,877.83
6. Step 6: Final answer
   x = 1,920.94