Finding the Third Proportional to 56,831 and 89,151

Step by Step Solution

1. Step 1: Write the proportion equation
   56,831 : 89,151 = 89,151 : x
2. Step 2: Convert to fraction form
   56,831/89,151 = 89,151/x
3. Step 3: Cross multiply
   56,831x = 89,151 × 89,151
4. Step 4: Simplify right side
   56,831x = 7,947,900,801
5. Step 5: Solve for x
   x = 7,947,900,801/56,831
6. Step 6: Final answer
   x = 139,851.50