Finding the Fourth Proportional to 4,062.05, 6,086.69 and 3,139.87

Step by Step Solution

1. Step 1: Write the proportion equation
   4,062.05 : 6,086.69 = 3,139.87 : x
2. Step 2: Convert to fraction form
   4,062.05/6,086.69 = 3,139.87/x
3. Step 3: Cross multiply
   4,062.05x = 6,086.69 × 3,139.87
4. Step 4: Simplify right side
   4,062.05x = 19,111,384.90
5. Step 5: Solve for x
   x = 19,111,384.90/4,062.05
6. Step 6: Final answer
   x = 4,704.86