Finding the Third Proportional to 12,992.25 and 20,248.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,992.25 : 20,248.88 = 20,248.88 : x
2. Step 2: Convert to fraction form
   12,992.25/20,248.88 = 20,248.88/x
3. Step 3: Cross multiply
   12,992.25x = 20,248.88 × 20,248.88
4. Step 4: Simplify right side
   12,992.25x = 410,016,938.77
5. Step 5: Solve for x
   x = 410,016,938.77/12,992.25
6. Step 6: Final answer
   x = 31,558.58