Finding the Third Proportional to 12,429 and 18,763.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429 : 18,763.50 = 18,763.50 : x
2. Step 2: Convert to fraction form
   12,429/18,763.50 = 18,763.50/x
3. Step 3: Cross multiply
   12,429x = 18,763.50 × 18,763.50
4. Step 4: Simplify right side
   12,429x = 352,068,932.25
5. Step 5: Solve for x
   x = 352,068,932.25/12,429
6. Step 6: Final answer
   x = 28,326.41