Finding the Fourth Proportional to 13,155.72, 18,151.92 and 7,849.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,155.72 : 18,151.92 = 7,849.50 : x
2. Step 2: Convert to fraction form
   13,155.72/18,151.92 = 7,849.50/x
3. Step 3: Cross multiply
   13,155.72x = 18,151.92 × 7,849.50
4. Step 4: Simplify right side
   13,155.72x = 142,483,496.04
5. Step 5: Solve for x
   x = 142,483,496.04/13,155.72
6. Step 6: Final answer
   x = 10,830.54