Finding the Third Proportional to 111,630 and 156,143

Step by Step Solution

1. Step 1: Write the proportion equation
   111,630 : 156,143 = 156,143 : x
2. Step 2: Convert to fraction form
   111,630/156,143 = 156,143/x
3. Step 3: Cross multiply
   111,630x = 156,143 × 156,143
4. Step 4: Simplify right side
   111,630x = 24,380,636,449
5. Step 5: Solve for x
   x = 24,380,636,449/111,630
6. Step 6: Final answer
   x = 218,405.77