Finding the Third Proportional to 1,207,240 and 2,558,392

Step by Step Solution

1. Step 1: Write the proportion equation
   1,207,240 : 2,558,392 = 2,558,392 : x
2. Step 2: Convert to fraction form
   1,207,240/2,558,392 = 2,558,392/x
3. Step 3: Cross multiply
   1,207,240x = 2,558,392 × 2,558,392
4. Step 4: Simplify right side
   1,207,240x = 6,545,369,625,664
5. Step 5: Solve for x
   x = 6,545,369,625,664/1,207,240
6. Step 6: Final answer
   x = 5,421,763.38