Finding the Third Proportional to 12,492 and 19,919.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,492 : 19,919.25 = 19,919.25 : x
2. Step 2: Convert to fraction form
   12,492/19,919.25 = 19,919.25/x
3. Step 3: Cross multiply
   12,492x = 19,919.25 × 19,919.25
4. Step 4: Simplify right side
   12,492x = 396,776,520.56
5. Step 5: Solve for x
   x = 396,776,520.56/12,492
6. Step 6: Final answer
   x = 31,762.45