Finding the Fourth Proportional to 3,921.45, 5,412.63 and 2,428.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.45 : 5,412.63 = 2,428.52 : x
2. Step 2: Convert to fraction form
   3,921.45/5,412.63 = 2,428.52/x
3. Step 3: Cross multiply
   3,921.45x = 5,412.63 × 2,428.52
4. Step 4: Simplify right side
   3,921.45x = 13,144,662.25
5. Step 5: Solve for x
   x = 13,144,662.25/3,921.45
6. Step 6: Final answer
   x = 3,351.99