Finding the Fourth Proportional to 13,164.28, 18,158.22 and 7,855

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.28 : 18,158.22 = 7,855 : x
2. Step 2: Convert to fraction form
   13,164.28/18,158.22 = 7,855/x
3. Step 3: Cross multiply
   13,164.28x = 18,158.22 × 7,855
4. Step 4: Simplify right side
   13,164.28x = 142,632,818.10
5. Step 5: Solve for x
   x = 142,632,818.10/13,164.28
6. Step 6: Final answer
   x = 10,834.84