Finding the Fourth Proportional to 9,916.71, 13,684.37 and 5,440.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916.71 : 13,684.37 = 5,440.37 : x
2. Step 2: Convert to fraction form
   9,916.71/13,684.37 = 5,440.37/x
3. Step 3: Cross multiply
   9,916.71x = 13,684.37 × 5,440.37
4. Step 4: Simplify right side
   9,916.71x = 74,447,940.39
5. Step 5: Solve for x
   x = 74,447,940.39/9,916.71
6. Step 6: Final answer
   x = 7,507.32