Finding the Fourth Proportional to 13,162.80, 18,164.88 and 7,858.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,162.80 : 18,164.88 = 7,858.08 : x
2. Step 2: Convert to fraction form
   13,162.80/18,164.88 = 7,858.08/x
3. Step 3: Cross multiply
   13,162.80x = 18,164.88 × 7,858.08
4. Step 4: Simplify right side
   13,162.80x = 142,741,080.23
5. Step 5: Solve for x
   x = 142,741,080.23/13,162.80
6. Step 6: Final answer
   x = 10,844.28