Finding the Third Proportional to 72,512 and 111,488

Step by Step Solution

1. Step 1: Write the proportion equation
   72,512 : 111,488 = 111,488 : x
2. Step 2: Convert to fraction form
   72,512/111,488 = 111,488/x
3. Step 3: Cross multiply
   72,512x = 111,488 × 111,488
4. Step 4: Simplify right side
   72,512x = 12,429,574,144
5. Step 5: Solve for x
   x = 12,429,574,144/72,512
6. Step 6: Final answer
   x = 171,414.03