Finding the Third Proportional to 13,385.25 and 20,425.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.25 : 20,425.50 = 20,425.50 : x
2. Step 2: Convert to fraction form
   13,385.25/20,425.50 = 20,425.50/x
3. Step 3: Cross multiply
   13,385.25x = 20,425.50 × 20,425.50
4. Step 4: Simplify right side
   13,385.25x = 417,201,050.25
5. Step 5: Solve for x
   x = 417,201,050.25/13,385.25
6. Step 6: Final answer
   x = 31,168.72