Finding the Third Proportional to 12,997.50 and 20,116.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,997.50 : 20,116.88 = 20,116.88 : x
2. Step 2: Convert to fraction form
   12,997.50/20,116.88 = 20,116.88/x
3. Step 3: Cross multiply
   12,997.50x = 20,116.88 × 20,116.88
4. Step 4: Simplify right side
   12,997.50x = 404,688,659.77
5. Step 5: Solve for x
   x = 404,688,659.77/12,997.50
6. Step 6: Final answer
   x = 31,135.88