Finding the Fourth Proportional to 3,109.50, 4,665.87 and 1,377.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,109.50 : 4,665.87 = 1,377.72 : x
2. Step 2: Convert to fraction form
   3,109.50/4,665.87 = 1,377.72/x
3. Step 3: Cross multiply
   3,109.50x = 4,665.87 × 1,377.72
4. Step 4: Simplify right side
   3,109.50x = 6,428,262.42
5. Step 5: Solve for x
   x = 6,428,262.42/3,109.50
6. Step 6: Final answer
   x = 2,067.30