Finding the Third Proportional to 13,867.61 and 20,587.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,867.61 : 20,587.61 = 20,587.61 : x
2. Step 2: Convert to fraction form
   13,867.61/20,587.61 = 20,587.61/x
3. Step 3: Cross multiply
   13,867.61x = 20,587.61 × 20,587.61
4. Step 4: Simplify right side
   13,867.61x = 423,849,498.94
5. Step 5: Solve for x
   x = 423,849,498.94/13,867.61
6. Step 6: Final answer
   x = 30,563.99