Finding the Fourth Proportional to 6,868.13, 9,478.01 and 3,724.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,868.13 : 9,478.01 = 3,724.31 : x
2. Step 2: Convert to fraction form
   6,868.13/9,478.01 = 3,724.31/x
3. Step 3: Cross multiply
   6,868.13x = 9,478.01 × 3,724.31
4. Step 4: Simplify right side
   6,868.13x = 35,299,080.43
5. Step 5: Solve for x
   x = 35,299,080.43/6,868.13
6. Step 6: Final answer
   x = 5,139.55