Finding the Third Proportional to 10,019.25 and 21,428.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,019.25 : 21,428.25 = 21,428.25 : x
2. Step 2: Convert to fraction form
   10,019.25/21,428.25 = 21,428.25/x
3. Step 3: Cross multiply
   10,019.25x = 21,428.25 × 21,428.25
4. Step 4: Simplify right side
   10,019.25x = 459,169,898.06
5. Step 5: Solve for x
   x = 459,169,898.06/10,019.25
6. Step 6: Final answer
   x = 45,828.77