Finding the Fourth Proportional to 12,901.50, 19,355.50 and 3,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,901.50 : 19,355.50 = 3,667.50 : x
2. Step 2: Convert to fraction form
   12,901.50/19,355.50 = 3,667.50/x
3. Step 3: Cross multiply
   12,901.50x = 19,355.50 × 3,667.50
4. Step 4: Simplify right side
   12,901.50x = 70,986,300.83
5. Step 5: Solve for x
   x = 70,986,300.83/12,901.50
6. Step 6: Final answer
   x = 5,502.17