Finding the Third Proportional to 39,172 and 87,064

Step by Step Solution

1. Step 1: Write the proportion equation
   39,172 : 87,064 = 87,064 : x
2. Step 2: Convert to fraction form
   39,172/87,064 = 87,064/x
3. Step 3: Cross multiply
   39,172x = 87,064 × 87,064
4. Step 4: Simplify right side
   39,172x = 7,580,140,096
5. Step 5: Solve for x
   x = 7,580,140,096/39,172
6. Step 6: Final answer
   x = 193,509.14