Finding the Third Proportional to 789,390 and 1,224,531

Step by Step Solution

1. Step 1: Write the proportion equation
   789,390 : 1,224,531 = 1,224,531 : x
2. Step 2: Convert to fraction form
   789,390/1,224,531 = 1,224,531/x
3. Step 3: Cross multiply
   789,390x = 1,224,531 × 1,224,531
4. Step 4: Simplify right side
   789,390x = 1,499,476,169,961
5. Step 5: Solve for x
   x = 1,499,476,169,961/789,390
6. Step 6: Final answer
   x = 1,899,537.83