Finding the Third Proportional to 1,430,220 and 2,120,589

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430,220 : 2,120,589 = 2,120,589 : x
2. Step 2: Convert to fraction form
   1,430,220/2,120,589 = 2,120,589/x
3. Step 3: Cross multiply
   1,430,220x = 2,120,589 × 2,120,589
4. Step 4: Simplify right side
   1,430,220x = 4,496,897,706,921
5. Step 5: Solve for x
   x = 4,496,897,706,921/1,430,220
6. Step 6: Final answer
   x = 3,144,199.99