Finding the Third Proportional to 12,355.50 and 18,781.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.50 : 18,781.50 = 18,781.50 : x
2. Step 2: Convert to fraction form
   12,355.50/18,781.50 = 18,781.50/x
3. Step 3: Cross multiply
   12,355.50x = 18,781.50 × 18,781.50
4. Step 4: Simplify right side
   12,355.50x = 352,744,742.25
5. Step 5: Solve for x
   x = 352,744,742.25/12,355.50
6. Step 6: Final answer
   x = 28,549.61