Finding the Third Proportional to 623,947.50 and 891,621

Step by Step Solution

1. Step 1: Write the proportion equation
   623,947.50 : 891,621 = 891,621 : x
2. Step 2: Convert to fraction form
   623,947.50/891,621 = 891,621/x
3. Step 3: Cross multiply
   623,947.50x = 891,621 × 891,621
4. Step 4: Simplify right side
   623,947.50x = 794,988,007,641
5. Step 5: Solve for x
   x = 794,988,007,641/623,947.50
6. Step 6: Final answer
   x = 1,274,126.44