Finding the Third Proportional to 13,387.78 and 20,594.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,387.78 : 20,594.25 = 20,594.25 : x
2. Step 2: Convert to fraction form
   13,387.78/20,594.25 = 20,594.25/x
3. Step 3: Cross multiply
   13,387.78x = 20,594.25 × 20,594.25
4. Step 4: Simplify right side
   13,387.78x = 424,123,133.06
5. Step 5: Solve for x
   x = 424,123,133.06/13,387.78
6. Step 6: Final answer
   x = 31,679.87