Finding the Third Proportional to 653,020.50 and 989,386.50

Step by Step Solution

1. Step 1: Write the proportion equation
   653,020.50 : 989,386.50 = 989,386.50 : x
2. Step 2: Convert to fraction form
   653,020.50/989,386.50 = 989,386.50/x
3. Step 3: Cross multiply
   653,020.50x = 989,386.50 × 989,386.50
4. Step 4: Simplify right side
   653,020.50x = 978,885,646,382.25
5. Step 5: Solve for x
   x = 978,885,646,382.25/653,020.50
6. Step 6: Final answer
   x = 1,499,012.12