Finding the Third Proportional to 1,372,590 and 1,980,129

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372,590 : 1,980,129 = 1,980,129 : x
2. Step 2: Convert to fraction form
   1,372,590/1,980,129 = 1,980,129/x
3. Step 3: Cross multiply
   1,372,590x = 1,980,129 × 1,980,129
4. Step 4: Simplify right side
   1,372,590x = 3,920,910,856,641
5. Step 5: Solve for x
   x = 3,920,910,856,641/1,372,590
6. Step 6: Final answer
   x = 2,856,578.33