Finding the Third Proportional to 10,072.69 and 13,387.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,072.69 : 13,387.78 = 13,387.78 : x
2. Step 2: Convert to fraction form
   10,072.69/13,387.78 = 13,387.78/x
3. Step 3: Cross multiply
   10,072.69x = 13,387.78 × 13,387.78
4. Step 4: Simplify right side
   10,072.69x = 179,232,686.80
5. Step 5: Solve for x
   x = 179,232,686.80/10,072.69
6. Step 6: Final answer
   x = 17,793.93