Finding the Third Proportional to 1,263,980 and 1,788,490

Step by Step Solution

1. Step 1: Write the proportion equation
   1,263,980 : 1,788,490 = 1,788,490 : x
2. Step 2: Convert to fraction form
   1,263,980/1,788,490 = 1,788,490/x
3. Step 3: Cross multiply
   1,263,980x = 1,788,490 × 1,788,490
4. Step 4: Simplify right side
   1,263,980x = 3,198,696,480,100
5. Step 5: Solve for x
   x = 3,198,696,480,100/1,263,980
6. Step 6: Final answer
   x = 2,530,654.35