Finding the Third Proportional to 402,439.50 and 851,466

Step by Step Solution

1. Step 1: Write the proportion equation
   402,439.50 : 851,466 = 851,466 : x
2. Step 2: Convert to fraction form
   402,439.50/851,466 = 851,466/x
3. Step 3: Cross multiply
   402,439.50x = 851,466 × 851,466
4. Step 4: Simplify right side
   402,439.50x = 724,994,349,156
5. Step 5: Solve for x
   x = 724,994,349,156/402,439.50
6. Step 6: Final answer
   x = 1,801,498.98