Finding the Third Proportional to 661,372.50 and 989,484

Step by Step Solution

1. Step 1: Write the proportion equation
   661,372.50 : 989,484 = 989,484 : x
2. Step 2: Convert to fraction form
   661,372.50/989,484 = 989,484/x
3. Step 3: Cross multiply
   661,372.50x = 989,484 × 989,484
4. Step 4: Simplify right side
   661,372.50x = 979,078,586,256
5. Step 5: Solve for x
   x = 979,078,586,256/661,372.50
6. Step 6: Final answer
   x = 1,480,373.90