Finding the Third Proportional to 1,248,590 and 2,686,558

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248,590 : 2,686,558 = 2,686,558 : x
2. Step 2: Convert to fraction form
   1,248,590/2,686,558 = 2,686,558/x
3. Step 3: Cross multiply
   1,248,590x = 2,686,558 × 2,686,558
4. Step 4: Simplify right side
   1,248,590x = 7,217,593,887,364
5. Step 5: Solve for x
   x = 7,217,593,887,364/1,248,590
6. Step 6: Final answer
   x = 5,780,595.62