Finding the Third Proportional to 111,621 and 156,132

Step by Step Solution

1. Step 1: Write the proportion equation
   111,621 : 156,132 = 156,132 : x
2. Step 2: Convert to fraction form
   111,621/156,132 = 156,132/x
3. Step 3: Cross multiply
   111,621x = 156,132 × 156,132
4. Step 4: Simplify right side
   111,621x = 24,377,201,424
5. Step 5: Solve for x
   x = 24,377,201,424/111,621
6. Step 6: Final answer
   x = 218,392.61