Finding the Third Proportional to 1,242,112 and 2,661,289

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242,112 : 2,661,289 = 2,661,289 : x
2. Step 2: Convert to fraction form
   1,242,112/2,661,289 = 2,661,289/x
3. Step 3: Cross multiply
   1,242,112x = 2,661,289 × 2,661,289
4. Step 4: Simplify right side
   1,242,112x = 7,082,459,141,521
5. Step 5: Solve for x
   x = 7,082,459,141,521/1,242,112
6. Step 6: Final answer
   x = 5,701,948.89