Finding the Third Proportional to 289,648.50 and 605,781

Step by Step Solution

1. Step 1: Write the proportion equation
   289,648.50 : 605,781 = 605,781 : x
2. Step 2: Convert to fraction form
   289,648.50/605,781 = 605,781/x
3. Step 3: Cross multiply
   289,648.50x = 605,781 × 605,781
4. Step 4: Simplify right side
   289,648.50x = 366,970,619,961
5. Step 5: Solve for x
   x = 366,970,619,961/289,648.50
6. Step 6: Final answer
   x = 1,266,951.56