Finding the Fourth Proportional to 6,836.91, 10,247.40 and 3,139.53

Step by Step Solution

1. Step 1: Write the proportion equation
   6,836.91 : 10,247.40 = 3,139.53 : x
2. Step 2: Convert to fraction form
   6,836.91/10,247.40 = 3,139.53/x
3. Step 3: Cross multiply
   6,836.91x = 10,247.40 × 3,139.53
4. Step 4: Simplify right side
   6,836.91x = 32,172,019.72
5. Step 5: Solve for x
   x = 32,172,019.72/6,836.91
6. Step 6: Final answer
   x = 4,705.64