Finding the Third Proportional to 98,631.50 and 139,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   98,631.50 : 139,561.50 = 139,561.50 : x
2. Step 2: Convert to fraction form
   98,631.50/139,561.50 = 139,561.50/x
3. Step 3: Cross multiply
   98,631.50x = 139,561.50 × 139,561.50
4. Step 4: Simplify right side
   98,631.50x = 19,477,412,282.25
5. Step 5: Solve for x
   x = 19,477,412,282.25/98,631.50
6. Step 6: Final answer
   x = 197,476.59