Finding the Third Proportional to 90,994.50 and 140,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,994.50 : 140,287.50 = 140,287.50 : x
2. Step 2: Convert to fraction form
   90,994.50/140,287.50 = 140,287.50/x
3. Step 3: Cross multiply
   90,994.50x = 140,287.50 × 140,287.50
4. Step 4: Simplify right side
   90,994.50x = 19,680,582,656.25
5. Step 5: Solve for x
   x = 19,680,582,656.25/90,994.50
6. Step 6: Final answer
   x = 216,283.21