Finding the Third Proportional to 56,902.50 and 86,136.75

Step by Step Solution

1. Step 1: Write the proportion equation
   56,902.50 : 86,136.75 = 86,136.75 : x
2. Step 2: Convert to fraction form
   56,902.50/86,136.75 = 86,136.75/x
3. Step 3: Cross multiply
   56,902.50x = 86,136.75 × 86,136.75
4. Step 4: Simplify right side
   56,902.50x = 7,419,539,700.56
5. Step 5: Solve for x
   x = 7,419,539,700.56/56,902.50
6. Step 6: Final answer
   x = 130,390.40