Finding the Fourth Proportional to 12,142.56, 18,175.62 and 8,372.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,142.56 : 18,175.62 = 8,372.28 : x
2. Step 2: Convert to fraction form
   12,142.56/18,175.62 = 8,372.28/x
3. Step 3: Cross multiply
   12,142.56x = 18,175.62 × 8,372.28
4. Step 4: Simplify right side
   12,142.56x = 152,171,379.81
5. Step 5: Solve for x
   x = 152,171,379.81/12,142.56
6. Step 6: Final answer
   x = 12,532.07