Finding the Fourth Proportional to 13,150.85, 18,145.19 and 7,844.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.85 : 18,145.19 = 7,844.63 : x
2. Step 2: Convert to fraction form
   13,150.85/18,145.19 = 7,844.63/x
3. Step 3: Cross multiply
   13,150.85x = 18,145.19 × 7,844.63
4. Step 4: Simplify right side
   13,150.85x = 142,342,230.72
5. Step 5: Solve for x
   x = 142,342,230.72/13,150.85
6. Step 6: Final answer
   x = 10,823.81