Finding the Fourth Proportional to 15,667.50, 21,626.01 and 10,078.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.50 : 21,626.01 = 10,078.50 : x
2. Step 2: Convert to fraction form
   15,667.50/21,626.01 = 10,078.50/x
3. Step 3: Cross multiply
   15,667.50x = 21,626.01 × 10,078.50
4. Step 4: Simplify right side
   15,667.50x = 217,957,741.79
5. Step 5: Solve for x
   x = 217,957,741.79/15,667.50
6. Step 6: Final answer
   x = 13,911.46