Finding the Third Proportional to 57,379.50 and 87,720.75

Step by Step Solution

1. Step 1: Write the proportion equation
   57,379.50 : 87,720.75 = 87,720.75 : x
2. Step 2: Convert to fraction form
   57,379.50/87,720.75 = 87,720.75/x
3. Step 3: Cross multiply
   57,379.50x = 87,720.75 × 87,720.75
4. Step 4: Simplify right side
   57,379.50x = 7,694,929,980.56
5. Step 5: Solve for x
   x = 7,694,929,980.56/57,379.50
6. Step 6: Final answer
   x = 134,105.91