Finding the Fourth Proportional to 9,917.71, 13,685.42 and 5,938.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.71 : 13,685.42 = 5,938.72 : x
2. Step 2: Convert to fraction form
   9,917.71/13,685.42 = 5,938.72/x
3. Step 3: Cross multiply
   9,917.71x = 13,685.42 × 5,938.72
4. Step 4: Simplify right side
   9,917.71x = 81,273,858.10
5. Step 5: Solve for x
   x = 81,273,858.10/9,917.71
6. Step 6: Final answer
   x = 8,194.82