Finding the Third Proportional to 90,340.50 and 140,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,340.50 : 140,515.50 = 140,515.50 : x
2. Step 2: Convert to fraction form
   90,340.50/140,515.50 = 140,515.50/x
3. Step 3: Cross multiply
   90,340.50x = 140,515.50 × 140,515.50
4. Step 4: Simplify right side
   90,340.50x = 19,744,605,740.25
5. Step 5: Solve for x
   x = 19,744,605,740.25/90,340.50
6. Step 6: Final answer
   x = 218,557.63