Finding the Third Proportional to 390,492 and 791,850

Step by Step Solution

1. Step 1: Write the proportion equation
   390,492 : 791,850 = 791,850 : x
2. Step 2: Convert to fraction form
   390,492/791,850 = 791,850/x
3. Step 3: Cross multiply
   390,492x = 791,850 × 791,850
4. Step 4: Simplify right side
   390,492x = 627,026,422,500
5. Step 5: Solve for x
   x = 627,026,422,500/390,492
6. Step 6: Final answer
   x = 1,605,734.36