Finding the Third Proportional to 72,280 and 111,236

Step by Step Solution

1. Step 1: Write the proportion equation
   72,280 : 111,236 = 111,236 : x
2. Step 2: Convert to fraction form
   72,280/111,236 = 111,236/x
3. Step 3: Cross multiply
   72,280x = 111,236 × 111,236
4. Step 4: Simplify right side
   72,280x = 12,373,447,696
5. Step 5: Solve for x
   x = 12,373,447,696/72,280
6. Step 6: Final answer
   x = 171,187.71