Finding the Fourth Proportional to 13,162.23, 18,166.28 and 7,857.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,162.23 : 18,166.28 = 7,857.41 : x
2. Step 2: Convert to fraction form
   13,162.23/18,166.28 = 7,857.41/x
3. Step 3: Cross multiply
   13,162.23x = 18,166.28 × 7,857.41
4. Step 4: Simplify right side
   13,162.23x = 142,739,780.02
5. Step 5: Solve for x
   x = 142,739,780.02/13,162.23
6. Step 6: Final answer
   x = 10,844.65