Finding the Third Proportional to 12,006 and 15,931.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,006 : 15,931.50 = 15,931.50 : x
2. Step 2: Convert to fraction form
   12,006/15,931.50 = 15,931.50/x
3. Step 3: Cross multiply
   12,006x = 15,931.50 × 15,931.50
4. Step 4: Simplify right side
   12,006x = 253,812,692.25
5. Step 5: Solve for x
   x = 253,812,692.25/12,006
6. Step 6: Final answer
   x = 21,140.49