Finding the Third Proportional to 1,312,103 and 2,142,561

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312,103 : 2,142,561 = 2,142,561 : x
2. Step 2: Convert to fraction form
   1,312,103/2,142,561 = 2,142,561/x
3. Step 3: Cross multiply
   1,312,103x = 2,142,561 × 2,142,561
4. Step 4: Simplify right side
   1,312,103x = 4,590,567,638,721
5. Step 5: Solve for x
   x = 4,590,567,638,721/1,312,103
6. Step 6: Final answer
   x = 3,498,633.60