Finding the Third Proportional to 12,510 and 19,918.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,510 : 19,918.50 = 19,918.50 : x
2. Step 2: Convert to fraction form
   12,510/19,918.50 = 19,918.50/x
3. Step 3: Cross multiply
   12,510x = 19,918.50 × 19,918.50
4. Step 4: Simplify right side
   12,510x = 396,746,642.25
5. Step 5: Solve for x
   x = 396,746,642.25/12,510
6. Step 6: Final answer
   x = 31,714.36