Finding the Third Proportional to 90,148.50 and 140,136.75

Step by Step Solution

1. Step 1: Write the proportion equation
   90,148.50 : 140,136.75 = 140,136.75 : x
2. Step 2: Convert to fraction form
   90,148.50/140,136.75 = 140,136.75/x
3. Step 3: Cross multiply
   90,148.50x = 140,136.75 × 140,136.75
4. Step 4: Simplify right side
   90,148.50x = 19,638,308,700.56
5. Step 5: Solve for x
   x = 19,638,308,700.56/90,148.50
6. Step 6: Final answer
   x = 217,843.99