Finding the Third Proportional to 405,738 and 631,570.50

Step by Step Solution

1. Step 1: Write the proportion equation
   405,738 : 631,570.50 = 631,570.50 : x
2. Step 2: Convert to fraction form
   405,738/631,570.50 = 631,570.50/x
3. Step 3: Cross multiply
   405,738x = 631,570.50 × 631,570.50
4. Step 4: Simplify right side
   405,738x = 398,881,296,470.25
5. Step 5: Solve for x
   x = 398,881,296,470.25/405,738
6. Step 6: Final answer
   x = 983,100.66