Finding the Third Proportional to 13,385.25 and 18,407.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,385.25 : 18,407.25 = 18,407.25 : x
2. Step 2: Convert to fraction form
   13,385.25/18,407.25 = 18,407.25/x
3. Step 3: Cross multiply
   13,385.25x = 18,407.25 × 18,407.25
4. Step 4: Simplify right side
   13,385.25x = 338,826,852.56
5. Step 5: Solve for x
   x = 338,826,852.56/13,385.25
6. Step 6: Final answer
   x = 25,313.45