Finding the Third Proportional to 402,321 and 863,058

Step by Step Solution

1. Step 1: Write the proportion equation
   402,321 : 863,058 = 863,058 : x
2. Step 2: Convert to fraction form
   402,321/863,058 = 863,058/x
3. Step 3: Cross multiply
   402,321x = 863,058 × 863,058
4. Step 4: Simplify right side
   402,321x = 744,869,111,364
5. Step 5: Solve for x
   x = 744,869,111,364/402,321
6. Step 6: Final answer
   x = 1,851,429.86