Finding the Fourth Proportional to 5,139.50, 7,709.61 and 2,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.50 : 7,709.61 = 2,061.50 : x
2. Step 2: Convert to fraction form
   5,139.50/7,709.61 = 2,061.50/x
3. Step 3: Cross multiply
   5,139.50x = 7,709.61 × 2,061.50
4. Step 4: Simplify right side
   5,139.50x = 15,893,361.02
5. Step 5: Solve for x
   x = 15,893,361.02/5,139.50
6. Step 6: Final answer
   x = 3,092.39