Finding the Third Proportional to 72,460 and 111,390

Step by Step Solution

1. Step 1: Write the proportion equation
   72,460 : 111,390 = 111,390 : x
2. Step 2: Convert to fraction form
   72,460/111,390 = 111,390/x
3. Step 3: Cross multiply
   72,460x = 111,390 × 111,390
4. Step 4: Simplify right side
   72,460x = 12,407,732,100
5. Step 5: Solve for x
   x = 12,407,732,100/72,460
6. Step 6: Final answer
   x = 171,235.61