Finding the Third Proportional to 14,780.81 and 20,788.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,780.81 : 20,788.31 = 20,788.31 : x
2. Step 2: Convert to fraction form
   14,780.81/20,788.31 = 20,788.31/x
3. Step 3: Cross multiply
   14,780.81x = 20,788.31 × 20,788.31
4. Step 4: Simplify right side
   14,780.81x = 432,153,936.60
5. Step 5: Solve for x
   x = 432,153,936.60/14,780.81
6. Step 6: Final answer
   x = 29,237.50