Finding the Fourth Proportional to 12,648.77, 18,969.55 and 3,763.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,648.77 : 18,969.55 = 3,763.75 : x
2. Step 2: Convert to fraction form
   12,648.77/18,969.55 = 3,763.75/x
3. Step 3: Cross multiply
   12,648.77x = 18,969.55 × 3,763.75
4. Step 4: Simplify right side
   12,648.77x = 71,396,548.96
5. Step 5: Solve for x
   x = 71,396,548.96/12,648.77
6. Step 6: Final answer
   x = 5,644.54