Finding the Third Proportional to 57,136.50 and 85,650.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,136.50 : 85,650.75 = 85,650.75 : x
2. Step 2: Convert to fraction form
   57,136.50/85,650.75 = 85,650.75/x
3. Step 3: Cross multiply
   57,136.50x = 85,650.75 × 85,650.75
4. Step 4: Simplify right side
   57,136.50x = 7,336,050,975.56
5. Step 5: Solve for x
   x = 7,336,050,975.56/57,136.50
6. Step 6: Final answer
   x = 128,395.18