Finding the Fourth Proportional to 10,802.39, 16,205.61 and 7,439.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,802.39 : 16,205.61 = 7,439.37 : x
2. Step 2: Convert to fraction form
   10,802.39/16,205.61 = 7,439.37/x
3. Step 3: Cross multiply
   10,802.39x = 16,205.61 × 7,439.37
4. Step 4: Simplify right side
   10,802.39x = 120,559,444.92
5. Step 5: Solve for x
   x = 120,559,444.92/10,802.39
6. Step 6: Final answer
   x = 11,160.44