Finding the Third Proportional to 45,630 and 68,139

Step by Step Solution

1. Step 1: Write the proportion equation
   45,630 : 68,139 = 68,139 : x
2. Step 2: Convert to fraction form
   45,630/68,139 = 68,139/x
3. Step 3: Cross multiply
   45,630x = 68,139 × 68,139
4. Step 4: Simplify right side
   45,630x = 4,642,923,321
5. Step 5: Solve for x
   x = 4,642,923,321/45,630
6. Step 6: Final answer
   x = 101,751.55