Finding the Fourth Proportional to 6,904.94, 9,528.51 and 3,920.72

Step by Step Solution

1. Step 1: Write the proportion equation
   6,904.94 : 9,528.51 = 3,920.72 : x
2. Step 2: Convert to fraction form
   6,904.94/9,528.51 = 3,920.72/x
3. Step 3: Cross multiply
   6,904.94x = 9,528.51 × 3,920.72
4. Step 4: Simplify right side
   6,904.94x = 37,358,619.73
5. Step 5: Solve for x
   x = 37,358,619.73/6,904.94
6. Step 6: Final answer
   x = 5,410.42