Finding the Fourth Proportional to 12,903.50, 19,358.50 and 3,669.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,903.50 : 19,358.50 = 3,669.50 : x
2. Step 2: Convert to fraction form
   12,903.50/19,358.50 = 3,669.50/x
3. Step 3: Cross multiply
   12,903.50x = 19,358.50 × 3,669.50
4. Step 4: Simplify right side
   12,903.50x = 71,036,015.75
5. Step 5: Solve for x
   x = 71,036,015.75/12,903.50
6. Step 6: Final answer
   x = 5,505.17