Finding the Fourth Proportional to 13,164.80, 18,167.10 and 7,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.80 : 18,167.10 = 7,196.50 : x
2. Step 2: Convert to fraction form
   13,164.80/18,167.10 = 7,196.50/x
3. Step 3: Cross multiply
   13,164.80x = 18,167.10 × 7,196.50
4. Step 4: Simplify right side
   13,164.80x = 130,739,444.31
5. Step 5: Solve for x
   x = 130,739,444.31/13,164.80
6. Step 6: Final answer
   x = 9,930.99