Finding the Third Proportional to 1,429,689 and 2,178,075

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429,689 : 2,178,075 = 2,178,075 : x
2. Step 2: Convert to fraction form
   1,429,689/2,178,075 = 2,178,075/x
3. Step 3: Cross multiply
   1,429,689x = 2,178,075 × 2,178,075
4. Step 4: Simplify right side
   1,429,689x = 4,744,010,705,625
5. Step 5: Solve for x
   x = 4,744,010,705,625/1,429,689
6. Step 6: Final answer
   x = 3,318,211.66