Finding the Third Proportional to 7,789.78 and 16,900.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,789.78 : 16,900.88 = 16,900.88 : x
2. Step 2: Convert to fraction form
   7,789.78/16,900.88 = 16,900.88/x
3. Step 3: Cross multiply
   7,789.78x = 16,900.88 × 16,900.88
4. Step 4: Simplify right side
   7,789.78x = 285,639,575.77
5. Step 5: Solve for x
   x = 285,639,575.77/7,789.78
6. Step 6: Final answer
   x = 36,668.50