Finding the Third Proportional to 1,379,290 and 2,152,780

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379,290 : 2,152,780 = 2,152,780 : x
2. Step 2: Convert to fraction form
   1,379,290/2,152,780 = 2,152,780/x
3. Step 3: Cross multiply
   1,379,290x = 2,152,780 × 2,152,780
4. Step 4: Simplify right side
   1,379,290x = 4,634,461,728,400
5. Step 5: Solve for x
   x = 4,634,461,728,400/1,379,290
6. Step 6: Final answer
   x = 3,360,034.31