Finding the Third Proportional to 12,999 and 30,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999 : 30,445.50 = 30,445.50 : x
2. Step 2: Convert to fraction form
   12,999/30,445.50 = 30,445.50/x
3. Step 3: Cross multiply
   12,999x = 30,445.50 × 30,445.50
4. Step 4: Simplify right side
   12,999x = 926,928,470.25
5. Step 5: Solve for x
   x = 926,928,470.25/12,999
6. Step 6: Final answer
   x = 71,307.68