Finding the Third Proportional to 9,925.50 and 21,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,925.50 : 21,290.50 = 21,290.50 : x
2. Step 2: Convert to fraction form
   9,925.50/21,290.50 = 21,290.50/x
3. Step 3: Cross multiply
   9,925.50x = 21,290.50 × 21,290.50
4. Step 4: Simplify right side
   9,925.50x = 453,285,390.25
5. Step 5: Solve for x
   x = 453,285,390.25/9,925.50
6. Step 6: Final answer
   x = 45,668.77