Finding the Third Proportional to 57,300.75 and 86,058.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,300.75 : 86,058.75 = 86,058.75 : x
2. Step 2: Convert to fraction form
   57,300.75/86,058.75 = 86,058.75/x
3. Step 3: Cross multiply
   57,300.75x = 86,058.75 × 86,058.75
4. Step 4: Simplify right side
   57,300.75x = 7,406,108,451.56
5. Step 5: Solve for x
   x = 7,406,108,451.56/57,300.75
6. Step 6: Final answer
   x = 129,249.76