Finding the Fourth Proportional to 12,136.42, 18,209.01 and 4,240.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,136.42 : 18,209.01 = 4,240.10 : x
2. Step 2: Convert to fraction form
   12,136.42/18,209.01 = 4,240.10/x
3. Step 3: Cross multiply
   12,136.42x = 18,209.01 × 4,240.10
4. Step 4: Simplify right side
   12,136.42x = 77,208,023.30
5. Step 5: Solve for x
   x = 77,208,023.30/12,136.42
6. Step 6: Final answer
   x = 6,361.68