Finding the Third Proportional to 409,642.50 and 838,968

Step by Step Solution

1. Step 1: Write the proportion equation
   409,642.50 : 838,968 = 838,968 : x
2. Step 2: Convert to fraction form
   409,642.50/838,968 = 838,968/x
3. Step 3: Cross multiply
   409,642.50x = 838,968 × 838,968
4. Step 4: Simplify right side
   409,642.50x = 703,867,305,024
5. Step 5: Solve for x
   x = 703,867,305,024/409,642.50
6. Step 6: Final answer
   x = 1,718,247.75