Finding the Third Proportional to 13,939.28 and 19,870.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,939.28 : 19,870.95 = 19,870.95 : x
2. Step 2: Convert to fraction form
   13,939.28/19,870.95 = 19,870.95/x
3. Step 3: Cross multiply
   13,939.28x = 19,870.95 × 19,870.95
4. Step 4: Simplify right side
   13,939.28x = 394,854,467.61
5. Step 5: Solve for x
   x = 394,854,467.61/13,939.28
6. Step 6: Final answer
   x = 28,326.75