Finding the Fourth Proportional to 13,164.04, 18,157.72 and 7,855.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.04 : 18,157.72 = 7,855.28 : x
2. Step 2: Convert to fraction form
   13,164.04/18,157.72 = 7,855.28/x
3. Step 3: Cross multiply
   13,164.04x = 18,157.72 × 7,855.28
4. Step 4: Simplify right side
   13,164.04x = 142,633,974.76
5. Step 5: Solve for x
   x = 142,633,974.76/13,164.04
6. Step 6: Final answer
   x = 10,835.12