Finding the Third Proportional to 1,253,490 and 1,909,611

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253,490 : 1,909,611 = 1,909,611 : x
2. Step 2: Convert to fraction form
   1,253,490/1,909,611 = 1,909,611/x
3. Step 3: Cross multiply
   1,253,490x = 1,909,611 × 1,909,611
4. Step 4: Simplify right side
   1,253,490x = 3,646,614,171,321
5. Step 5: Solve for x
   x = 3,646,614,171,321/1,253,490
6. Step 6: Final answer
   x = 2,909,168.94