Finding the Fourth Proportional to 9,917.69, 13,686.42 and 5,725.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.69 : 13,686.42 = 5,725.94 : x
2. Step 2: Convert to fraction form
   9,917.69/13,686.42 = 5,725.94/x
3. Step 3: Cross multiply
   9,917.69x = 13,686.42 × 5,725.94
4. Step 4: Simplify right side
   9,917.69x = 78,367,585.52
5. Step 5: Solve for x
   x = 78,367,585.52/9,917.69
6. Step 6: Final answer
   x = 7,901.80