Finding the Fourth Proportional to 9,916.15, 13,684.17 and 5,439.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916.15 : 13,684.17 = 5,439.94 : x
2. Step 2: Convert to fraction form
   9,916.15/13,684.17 = 5,439.94/x
3. Step 3: Cross multiply
   9,916.15x = 13,684.17 × 5,439.94
4. Step 4: Simplify right side
   9,916.15x = 74,440,995.33
5. Step 5: Solve for x
   x = 74,440,995.33/9,916.15
6. Step 6: Final answer
   x = 7,507.05