Finding the Third Proportional to 56,640 and 89,982

Step by Step Solution

1. Step 1: Write the proportion equation
   56,640 : 89,982 = 89,982 : x
2. Step 2: Convert to fraction form
   56,640/89,982 = 89,982/x
3. Step 3: Cross multiply
   56,640x = 89,982 × 89,982
4. Step 4: Simplify right side
   56,640x = 8,096,760,324
5. Step 5: Solve for x
   x = 8,096,760,324/56,640
6. Step 6: Final answer
   x = 142,951.28