Finding the Fourth Proportional to 6,863.86, 9,472.15 and 3,720.05

Step by Step Solution

1. Step 1: Write the proportion equation
   6,863.86 : 9,472.15 = 3,720.05 : x
2. Step 2: Convert to fraction form
   6,863.86/9,472.15 = 3,720.05/x
3. Step 3: Cross multiply
   6,863.86x = 9,472.15 × 3,720.05
4. Step 4: Simplify right side
   6,863.86x = 35,236,824.25
5. Step 5: Solve for x
   x = 35,236,824.25/6,863.86
6. Step 6: Final answer
   x = 5,133.68