Finding the Third Proportional to 653,155.50 and 989,589

Step by Step Solution

1. Step 1: Write the proportion equation
   653,155.50 : 989,589 = 989,589 : x
2. Step 2: Convert to fraction form
   653,155.50/989,589 = 989,589/x
3. Step 3: Cross multiply
   653,155.50x = 989,589 × 989,589
4. Step 4: Simplify right side
   653,155.50x = 979,286,388,921
5. Step 5: Solve for x
   x = 979,286,388,921/653,155.50
6. Step 6: Final answer
   x = 1,499,315.84