Finding the Fourth Proportional to 12,142.38, 18,213.60 and 3,377.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,142.38 : 18,213.60 = 3,377.30 : x
2. Step 2: Convert to fraction form
   12,142.38/18,213.60 = 3,377.30/x
3. Step 3: Cross multiply
   12,142.38x = 18,213.60 × 3,377.30
4. Step 4: Simplify right side
   12,142.38x = 61,512,768.51
5. Step 5: Solve for x
   x = 61,512,768.51/12,142.38
6. Step 6: Final answer
   x = 5,065.96