Finding the Third Proportional to 31,987 and 74,360

Step by Step Solution

1. Step 1: Write the proportion equation
   31,987 : 74,360 = 74,360 : x
2. Step 2: Convert to fraction form
   31,987/74,360 = 74,360/x
3. Step 3: Cross multiply
   31,987x = 74,360 × 74,360
4. Step 4: Simplify right side
   31,987x = 5,529,409,600
5. Step 5: Solve for x
   x = 5,529,409,600/31,987
6. Step 6: Final answer
   x = 172,864.28