Finding the Third Proportional to 98,963.50 and 215,687.50

Step by Step Solution

1. Step 1: Write the proportion equation
   98,963.50 : 215,687.50 = 215,687.50 : x
2. Step 2: Convert to fraction form
   98,963.50/215,687.50 = 215,687.50/x
3. Step 3: Cross multiply
   98,963.50x = 215,687.50 × 215,687.50
4. Step 4: Simplify right side
   98,963.50x = 46,521,097,656.25
5. Step 5: Solve for x
   x = 46,521,097,656.25/98,963.50
6. Step 6: Final answer
   x = 470,083.39