Finding the Fourth Proportional to 9,100.72, 13,653.24 and 3,906.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,100.72 : 13,653.24 = 3,906.64 : x
2. Step 2: Convert to fraction form
   9,100.72/13,653.24 = 3,906.64/x
3. Step 3: Cross multiply
   9,100.72x = 13,653.24 × 3,906.64
4. Step 4: Simplify right side
   9,100.72x = 53,338,293.51
5. Step 5: Solve for x
   x = 53,338,293.51/9,100.72
6. Step 6: Final answer
   x = 5,860.89