Finding the Third Proportional to 98,752.50 and 209,290.50

Step by Step Solution

1. Step 1: Write the proportion equation
   98,752.50 : 209,290.50 = 209,290.50 : x
2. Step 2: Convert to fraction form
   98,752.50/209,290.50 = 209,290.50/x
3. Step 3: Cross multiply
   98,752.50x = 209,290.50 × 209,290.50
4. Step 4: Simplify right side
   98,752.50x = 43,802,513,390.25
5. Step 5: Solve for x
   x = 43,802,513,390.25/98,752.50
6. Step 6: Final answer
   x = 443,558.53