Finding the Third Proportional to 111,628 and 156,140

Step by Step Solution

1. Step 1: Write the proportion equation
   111,628 : 156,140 = 156,140 : x
2. Step 2: Convert to fraction form
   111,628/156,140 = 156,140/x
3. Step 3: Cross multiply
   111,628x = 156,140 × 156,140
4. Step 4: Simplify right side
   111,628x = 24,379,699,600
5. Step 5: Solve for x
   x = 24,379,699,600/111,628
6. Step 6: Final answer
   x = 218,401.29