Finding the Fourth Proportional to 9,916.34, 13,684.73 and 5,439.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916.34 : 13,684.73 = 5,439.81 : x
2. Step 2: Convert to fraction form
   9,916.34/13,684.73 = 5,439.81/x
3. Step 3: Cross multiply
   9,916.34x = 13,684.73 × 5,439.81
4. Step 4: Simplify right side
   9,916.34x = 74,442,355.22
5. Step 5: Solve for x
   x = 74,442,355.22/9,916.34
6. Step 6: Final answer
   x = 7,507.04