Finding the Third Proportional to 578,285 and 1,253,105

Step by Step Solution

1. Step 1: Write the proportion equation
   578,285 : 1,253,105 = 1,253,105 : x
2. Step 2: Convert to fraction form
   578,285/1,253,105 = 1,253,105/x
3. Step 3: Cross multiply
   578,285x = 1,253,105 × 1,253,105
4. Step 4: Simplify right side
   578,285x = 1,570,272,141,025
5. Step 5: Solve for x
   x = 1,570,272,141,025/578,285
6. Step 6: Final answer
   x = 2,715,394.90