Finding the Third Proportional to 539,578.50 and 791,871

Step by Step Solution

1. Step 1: Write the proportion equation
   539,578.50 : 791,871 = 791,871 : x
2. Step 2: Convert to fraction form
   539,578.50/791,871 = 791,871/x
3. Step 3: Cross multiply
   539,578.50x = 791,871 × 791,871
4. Step 4: Simplify right side
   539,578.50x = 627,059,680,641
5. Step 5: Solve for x
   x = 627,059,680,641/539,578.50
6. Step 6: Final answer
   x = 1,162,128.74