Finding the Fourth Proportional to 13,078.02, 18,047.66 and 7,109.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,078.02 : 18,047.66 = 7,109.69 : x
2. Step 2: Convert to fraction form
   13,078.02/18,047.66 = 7,109.69/x
3. Step 3: Cross multiply
   13,078.02x = 18,047.66 × 7,109.69
4. Step 4: Simplify right side
   13,078.02x = 128,313,142.04
5. Step 5: Solve for x
   x = 128,313,142.04/13,078.02
6. Step 6: Final answer
   x = 9,811.36