Finding the Third Proportional to 31,499 and 51,555

Step by Step Solution

1. Step 1: Write the proportion equation
   31,499 : 51,555 = 51,555 : x
2. Step 2: Convert to fraction form
   31,499/51,555 = 51,555/x
3. Step 3: Cross multiply
   31,499x = 51,555 × 51,555
4. Step 4: Simplify right side
   31,499x = 2,657,918,025
5. Step 5: Solve for x
   x = 2,657,918,025/31,499
6. Step 6: Final answer
   x = 84,381.03