Finding the Third Proportional to 1,266,830 and 2,638,498

Step by Step Solution

1. Step 1: Write the proportion equation
   1,266,830 : 2,638,498 = 2,638,498 : x
2. Step 2: Convert to fraction form
   1,266,830/2,638,498 = 2,638,498/x
3. Step 3: Cross multiply
   1,266,830x = 2,638,498 × 2,638,498
4. Step 4: Simplify right side
   1,266,830x = 6,961,671,696,004
5. Step 5: Solve for x
   x = 6,961,671,696,004/1,266,830
6. Step 6: Final answer
   x = 5,495,347.99