Finding the Third Proportional to 655,587 and 989,374.50

Step by Step Solution

1. Step 1: Write the proportion equation
   655,587 : 989,374.50 = 989,374.50 : x
2. Step 2: Convert to fraction form
   655,587/989,374.50 = 989,374.50/x
3. Step 3: Cross multiply
   655,587x = 989,374.50 × 989,374.50
4. Step 4: Simplify right side
   655,587x = 978,861,901,250.25
5. Step 5: Solve for x
   x = 978,861,901,250.25/655,587
6. Step 6: Final answer
   x = 1,493,107.55