Finding the Third Proportional to 409,656 and 838,990.50

Step by Step Solution

1. Step 1: Write the proportion equation
   409,656 : 838,990.50 = 838,990.50 : x
2. Step 2: Convert to fraction form
   409,656/838,990.50 = 838,990.50/x
3. Step 3: Cross multiply
   409,656x = 838,990.50 × 838,990.50
4. Step 4: Simplify right side
   409,656x = 703,905,059,090.25
5. Step 5: Solve for x
   x = 703,905,059,090.25/409,656
6. Step 6: Final answer
   x = 1,718,283.29