Finding the Fourth Proportional to 13,162.52, 18,164.32 and 7,857.23

Step by Step Solution

1. Step 1: Write the proportion equation
   13,162.52 : 18,164.32 = 7,857.23 : x
2. Step 2: Convert to fraction form
   13,162.52/18,164.32 = 7,857.23/x
3. Step 3: Cross multiply
   13,162.52x = 18,164.32 × 7,857.23
4. Step 4: Simplify right side
   13,162.52x = 142,721,129.57
5. Step 5: Solve for x
   x = 142,721,129.57/13,162.52
6. Step 6: Final answer
   x = 10,842.99