Finding the Third Proportional to 1,426,134 and 2,139,509

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426,134 : 2,139,509 = 2,139,509 : x
2. Step 2: Convert to fraction form
   1,426,134/2,139,509 = 2,139,509/x
3. Step 3: Cross multiply
   1,426,134x = 2,139,509 × 2,139,509
4. Step 4: Simplify right side
   1,426,134x = 4,577,498,761,081
5. Step 5: Solve for x
   x = 4,577,498,761,081/1,426,134
6. Step 6: Final answer
   x = 3,209,725.57