Finding the Third Proportional to 640,370 and 1,380,052

Step by Step Solution

1. Step 1: Write the proportion equation
   640,370 : 1,380,052 = 1,380,052 : x
2. Step 2: Convert to fraction form
   640,370/1,380,052 = 1,380,052/x
3. Step 3: Cross multiply
   640,370x = 1,380,052 × 1,380,052
4. Step 4: Simplify right side
   640,370x = 1,904,543,522,704
5. Step 5: Solve for x
   x = 1,904,543,522,704/640,370
6. Step 6: Final answer
   x = 2,974,129.84