Finding the Third Proportional to 476,190 and 646,717.50

Step by Step Solution

1. Step 1: Write the proportion equation
   476,190 : 646,717.50 = 646,717.50 : x
2. Step 2: Convert to fraction form
   476,190/646,717.50 = 646,717.50/x
3. Step 3: Cross multiply
   476,190x = 646,717.50 × 646,717.50
4. Step 4: Simplify right side
   476,190x = 418,243,524,806.25
5. Step 5: Solve for x
   x = 418,243,524,806.25/476,190
6. Step 6: Final answer
   x = 878,312.28