Finding the Third Proportional to 661,242 and 989,298

Step by Step Solution

1. Step 1: Write the proportion equation
   661,242 : 989,298 = 989,298 : x
2. Step 2: Convert to fraction form
   661,242/989,298 = 989,298/x
3. Step 3: Cross multiply
   661,242x = 989,298 × 989,298
4. Step 4: Simplify right side
   661,242x = 978,710,532,804
5. Step 5: Solve for x
   x = 978,710,532,804/661,242
6. Step 6: Final answer
   x = 1,480,109.45