Finding the Third Proportional to 617,871 and 929,965.50

Step by Step Solution

1. Step 1: Write the proportion equation
   617,871 : 929,965.50 = 929,965.50 : x
2. Step 2: Convert to fraction form
   617,871/929,965.50 = 929,965.50/x
3. Step 3: Cross multiply
   617,871x = 929,965.50 × 929,965.50
4. Step 4: Simplify right side
   617,871x = 864,835,831,190.25
5. Step 5: Solve for x
   x = 864,835,831,190.25/617,871
6. Step 6: Final answer
   x = 1,399,702.90