Finding the Third Proportional to 89,880.25 and 140,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,880.25 : 140,991.50 = 140,991.50 : x
2. Step 2: Convert to fraction form
   89,880.25/140,991.50 = 140,991.50/x
3. Step 3: Cross multiply
   89,880.25x = 140,991.50 × 140,991.50
4. Step 4: Simplify right side
   89,880.25x = 19,878,603,072.25
5. Step 5: Solve for x
   x = 19,878,603,072.25/89,880.25
6. Step 6: Final answer
   x = 221,167.64