Finding the Fourth Proportional to 3,679.37, 5,077.57 and 2,000.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,679.37 : 5,077.57 = 2,000.78 : x
2. Step 2: Convert to fraction form
   3,679.37/5,077.57 = 2,000.78/x
3. Step 3: Cross multiply
   3,679.37x = 5,077.57 × 2,000.78
4. Step 4: Simplify right side
   3,679.37x = 10,159,100.50
5. Step 5: Solve for x
   x = 10,159,100.50/3,679.37
6. Step 6: Final answer
   x = 2,761.10