Finding the Third Proportional to 57,080 and 91,155

Step by Step Solution

1. Step 1: Write the proportion equation
   57,080 : 91,155 = 91,155 : x
2. Step 2: Convert to fraction form
   57,080/91,155 = 91,155/x
3. Step 3: Cross multiply
   57,080x = 91,155 × 91,155
4. Step 4: Simplify right side
   57,080x = 8,309,234,025
5. Step 5: Solve for x
   x = 8,309,234,025/57,080
6. Step 6: Final answer
   x = 145,571.72