Finding the Third Proportional to 428,434.50 and 930,621

Step by Step Solution

1. Step 1: Write the proportion equation
   428,434.50 : 930,621 = 930,621 : x
2. Step 2: Convert to fraction form
   428,434.50/930,621 = 930,621/x
3. Step 3: Cross multiply
   428,434.50x = 930,621 × 930,621
4. Step 4: Simplify right side
   428,434.50x = 866,055,445,641
5. Step 5: Solve for x
   x = 866,055,445,641/428,434.50
6. Step 6: Final answer
   x = 2,021,441.89