Finding the Fourth Proportional to 12,462.72, 18,692.10 and 4,142.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,462.72 : 18,692.10 = 4,142.04 : x
2. Step 2: Convert to fraction form
   12,462.72/18,692.10 = 4,142.04/x
3. Step 3: Cross multiply
   12,462.72x = 18,692.10 × 4,142.04
4. Step 4: Simplify right side
   12,462.72x = 77,423,425.88
5. Step 5: Solve for x
   x = 77,423,425.88/12,462.72
6. Step 6: Final answer
   x = 6,212.40