Finding the Fourth Proportional to 13,153.36, 18,151.17 and 7,845.43

Step by Step Solution

1. Step 1: Write the proportion equation
   13,153.36 : 18,151.17 = 7,845.43 : x
2. Step 2: Convert to fraction form
   13,153.36/18,151.17 = 7,845.43/x
3. Step 3: Cross multiply
   13,153.36x = 18,151.17 × 7,845.43
4. Step 4: Simplify right side
   13,153.36x = 142,403,642.90
5. Step 5: Solve for x
   x = 142,403,642.90/13,153.36
6. Step 6: Final answer
   x = 10,826.41