Finding the Third Proportional to 72,578 and 112,103

Step by Step Solution

1. Step 1: Write the proportion equation
   72,578 : 112,103 = 112,103 : x
2. Step 2: Convert to fraction form
   72,578/112,103 = 112,103/x
3. Step 3: Cross multiply
   72,578x = 112,103 × 112,103
4. Step 4: Simplify right side
   72,578x = 12,567,082,609
5. Step 5: Solve for x
   x = 12,567,082,609/72,578
6. Step 6: Final answer
   x = 173,152.78