Finding the Fourth Proportional to 9,917.56, 13,684.71 and 5,725

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.56 : 13,684.71 = 5,725 : x
2. Step 2: Convert to fraction form
   9,917.56/13,684.71 = 5,725/x
3. Step 3: Cross multiply
   9,917.56x = 13,684.71 × 5,725
4. Step 4: Simplify right side
   9,917.56x = 78,344,964.75
5. Step 5: Solve for x
   x = 78,344,964.75/9,917.56
6. Step 6: Final answer
   x = 7,899.62