Finding the Fourth Proportional to 13,150.72, 18,145.02 and 7,844.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.72 : 18,145.02 = 7,844.50 : x
2. Step 2: Convert to fraction form
   13,150.72/18,145.02 = 7,844.50/x
3. Step 3: Cross multiply
   13,150.72x = 18,145.02 × 7,844.50
4. Step 4: Simplify right side
   13,150.72x = 142,338,609.39
5. Step 5: Solve for x
   x = 142,338,609.39/13,150.72
6. Step 6: Final answer
   x = 10,823.64