Finding the Fourth Proportional to 12,172.02, 18,258.49 and 3,406.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,172.02 : 18,258.49 = 3,406.71 : x
2. Step 2: Convert to fraction form
   12,172.02/18,258.49 = 3,406.71/x
3. Step 3: Cross multiply
   12,172.02x = 18,258.49 × 3,406.71
4. Step 4: Simplify right side
   12,172.02x = 62,201,272.14
5. Step 5: Solve for x
   x = 62,201,272.14/12,172.02
6. Step 6: Final answer
   x = 5,110.18