Finding the Fourth Proportional to 12,662.97, 18,993.02 and 3,428.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,662.97 : 18,993.02 = 3,428.25 : x
2. Step 2: Convert to fraction form
   12,662.97/18,993.02 = 3,428.25/x
3. Step 3: Cross multiply
   12,662.97x = 18,993.02 × 3,428.25
4. Step 4: Simplify right side
   12,662.97x = 65,112,803.67
5. Step 5: Solve for x
   x = 65,112,803.67/12,662.97
6. Step 6: Final answer
   x = 5,141.99