Finding the Third Proportional to 57,920 and 90,264

Step by Step Solution

1. Step 1: Write the proportion equation
   57,920 : 90,264 = 90,264 : x
2. Step 2: Convert to fraction form
   57,920/90,264 = 90,264/x
3. Step 3: Cross multiply
   57,920x = 90,264 × 90,264
4. Step 4: Simplify right side
   57,920x = 8,147,589,696
5. Step 5: Solve for x
   x = 8,147,589,696/57,920
6. Step 6: Final answer
   x = 140,669.71