Finding the Fourth Proportional to 13,164.78, 18,167.40 and 7,196.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,164.78 : 18,167.40 = 7,196.47 : x
2. Step 2: Convert to fraction form
   13,164.78/18,167.40 = 7,196.47/x
3. Step 3: Cross multiply
   13,164.78x = 18,167.40 × 7,196.47
4. Step 4: Simplify right side
   13,164.78x = 130,741,113.10
5. Step 5: Solve for x
   x = 130,741,113.10/13,164.78
6. Step 6: Final answer
   x = 9,931.13