Finding the Fourth Proportional to 9,908.56, 13,673.70 and 5,716.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,908.56 : 13,673.70 = 5,716.72 : x
2. Step 2: Convert to fraction form
   9,908.56/13,673.70 = 5,716.72/x
3. Step 3: Cross multiply
   9,908.56x = 13,673.70 × 5,716.72
4. Step 4: Simplify right side
   9,908.56x = 78,168,714.26
5. Step 5: Solve for x
   x = 78,168,714.26/9,908.56
6. Step 6: Final answer
   x = 7,889.01