Finding the Third Proportional to 13,986 and 30,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,986 : 30,415.50 = 30,415.50 : x
2. Step 2: Convert to fraction form
   13,986/30,415.50 = 30,415.50/x
3. Step 3: Cross multiply
   13,986x = 30,415.50 × 30,415.50
4. Step 4: Simplify right side
   13,986x = 925,102,640.25
5. Step 5: Solve for x
   x = 925,102,640.25/13,986
6. Step 6: Final answer
   x = 66,144.90