Finding the Fourth Proportional to 10,959.84, 16,425.92 and 7,009.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,959.84 : 16,425.92 = 7,009.60 : x
2. Step 2: Convert to fraction form
   10,959.84/16,425.92 = 7,009.60/x
3. Step 3: Cross multiply
   10,959.84x = 16,425.92 × 7,009.60
4. Step 4: Simplify right side
   10,959.84x = 115,139,128.83
5. Step 5: Solve for x
   x = 115,139,128.83/10,959.84
6. Step 6: Final answer
   x = 10,505.55