Finding the Third Proportional to 21,930.50 and 53,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,930.50 : 53,028.50 = 53,028.50 : x
2. Step 2: Convert to fraction form
   21,930.50/53,028.50 = 53,028.50/x
3. Step 3: Cross multiply
   21,930.50x = 53,028.50 × 53,028.50
4. Step 4: Simplify right side
   21,930.50x = 2,812,021,812.25
5. Step 5: Solve for x
   x = 2,812,021,812.25/21,930.50
6. Step 6: Final answer
   x = 128,224.25