Finding the Third Proportional to 661,245 and 989,302.50

Step by Step Solution

1. Step 1: Write the proportion equation
   661,245 : 989,302.50 = 989,302.50 : x
2. Step 2: Convert to fraction form
   661,245/989,302.50 = 989,302.50/x
3. Step 3: Cross multiply
   661,245x = 989,302.50 × 989,302.50
4. Step 4: Simplify right side
   661,245x = 978,719,436,506.25
5. Step 5: Solve for x
   x = 978,719,436,506.25/661,245
6. Step 6: Final answer
   x = 1,480,116.20