Finding the Third Proportional to 402,450.50 and 874,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   402,450.50 : 874,789.50 = 874,789.50 : x
2. Step 2: Convert to fraction form
   402,450.50/874,789.50 = 874,789.50/x
3. Step 3: Cross multiply
   402,450.50x = 874,789.50 × 874,789.50
4. Step 4: Simplify right side
   402,450.50x = 765,256,669,310.25
5. Step 5: Solve for x
   x = 765,256,669,310.25/402,450.50
6. Step 6: Final answer
   x = 1,901,492.65