Finding the Third Proportional to 12,210.75 and 20,644.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,210.75 : 20,644.88 = 20,644.88 : x
2. Step 2: Convert to fraction form
   12,210.75/20,644.88 = 20,644.88/x
3. Step 3: Cross multiply
   12,210.75x = 20,644.88 × 20,644.88
4. Step 4: Simplify right side
   12,210.75x = 426,210,863.77
5. Step 5: Solve for x
   x = 426,210,863.77/12,210.75
6. Step 6: Final answer
   x = 34,904.56