Finding the Third Proportional to 72,429 and 111,921

Step by Step Solution

1. Step 1: Write the proportion equation
   72,429 : 111,921 = 111,921 : x
2. Step 2: Convert to fraction form
   72,429/111,921 = 111,921/x
3. Step 3: Cross multiply
   72,429x = 111,921 × 111,921
4. Step 4: Simplify right side
   72,429x = 12,526,310,241
5. Step 5: Solve for x
   x = 12,526,310,241/72,429
6. Step 6: Final answer
   x = 172,946.06