Finding the Third Proportional to 12,999.25 and 19,307.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,999.25 : 19,307.69 = 19,307.69 : x
2. Step 2: Convert to fraction form
   12,999.25/19,307.69 = 19,307.69/x
3. Step 3: Cross multiply
   12,999.25x = 19,307.69 × 19,307.69
4. Step 4: Simplify right side
   12,999.25x = 372,786,796.60
5. Step 5: Solve for x
   x = 372,786,796.60/12,999.25
6. Step 6: Final answer
   x = 28,677.56