Finding the Fourth Proportional to 8,142.68, 12,219.90 and 3,463.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,142.68 : 12,219.90 = 3,463.98 : x
2. Step 2: Convert to fraction form
   8,142.68/12,219.90 = 3,463.98/x
3. Step 3: Cross multiply
   8,142.68x = 12,219.90 × 3,463.98
4. Step 4: Simplify right side
   8,142.68x = 42,329,499.12
5. Step 5: Solve for x
   x = 42,329,499.12/8,142.68
6. Step 6: Final answer
   x = 5,198.47