Finding the Third Proportional to 9,499.13 and 20,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.13 : 20,638.50 = 20,638.50 : x
2. Step 2: Convert to fraction form
   9,499.13/20,638.50 = 20,638.50/x
3. Step 3: Cross multiply
   9,499.13x = 20,638.50 × 20,638.50
4. Step 4: Simplify right side
   9,499.13x = 425,947,682.25
5. Step 5: Solve for x
   x = 425,947,682.25/9,499.13
6. Step 6: Final answer
   x = 44,840.73