Finding the Fourth Proportional to 6,856.71, 9,462.21 and 3,712.88

Step by Step Solution

1. Step 1: Write the proportion equation
   6,856.71 : 9,462.21 = 3,712.88 : x
2. Step 2: Convert to fraction form
   6,856.71/9,462.21 = 3,712.88/x
3. Step 3: Cross multiply
   6,856.71x = 9,462.21 × 3,712.88
4. Step 4: Simplify right side
   6,856.71x = 35,132,002.95
5. Step 5: Solve for x
   x = 35,132,002.95/6,856.71
6. Step 6: Final answer
   x = 5,123.74