Finding the Third Proportional to 811,372 and 1,261,290

Step by Step Solution

1. Step 1: Write the proportion equation
   811,372 : 1,261,290 = 1,261,290 : x
2. Step 2: Convert to fraction form
   811,372/1,261,290 = 1,261,290/x
3. Step 3: Cross multiply
   811,372x = 1,261,290 × 1,261,290
4. Step 4: Simplify right side
   811,372x = 1,590,852,464,100
5. Step 5: Solve for x
   x = 1,590,852,464,100/811,372
6. Step 6: Final answer
   x = 1,960,694.31