Finding the Third Proportional to 10,020.90 and 21,515.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,020.90 : 21,515.47 = 21,515.47 : x
2. Step 2: Convert to fraction form
   10,020.90/21,515.47 = 21,515.47/x
3. Step 3: Cross multiply
   10,020.90x = 21,515.47 × 21,515.47
4. Step 4: Simplify right side
   10,020.90x = 462,915,311.49
5. Step 5: Solve for x
   x = 462,915,311.49/10,020.90
6. Step 6: Final answer
   x = 46,194.97