Finding the Third Proportional to 90,256.50 and 140,211

Step by Step Solution

1. Step 1: Write the proportion equation
   90,256.50 : 140,211 = 140,211 : x
2. Step 2: Convert to fraction form
   90,256.50/140,211 = 140,211/x
3. Step 3: Cross multiply
   90,256.50x = 140,211 × 140,211
4. Step 4: Simplify right side
   90,256.50x = 19,659,124,521
5. Step 5: Solve for x
   x = 19,659,124,521/90,256.50
6. Step 6: Final answer
   x = 217,813.95