Finding the Third Proportional to 121,518 and 162,586.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,518 : 162,586.50 = 162,586.50 : x
2. Step 2: Convert to fraction form
   121,518/162,586.50 = 162,586.50/x
3. Step 3: Cross multiply
   121,518x = 162,586.50 × 162,586.50
4. Step 4: Simplify right side
   121,518x = 26,434,369,982.25
5. Step 5: Solve for x
   x = 26,434,369,982.25/121,518
6. Step 6: Final answer
   x = 217,534.60