Finding the Third Proportional to 684,254.50 and 985,643

Step by Step Solution

1. Step 1: Write the proportion equation
   684,254.50 : 985,643 = 985,643 : x
2. Step 2: Convert to fraction form
   684,254.50/985,643 = 985,643/x
3. Step 3: Cross multiply
   684,254.50x = 985,643 × 985,643
4. Step 4: Simplify right side
   684,254.50x = 971,492,123,449
5. Step 5: Solve for x
   x = 971,492,123,449/684,254.50
6. Step 6: Final answer
   x = 1,419,781.86