Finding the Third Proportional to 13,684.55 and 20,587.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,684.55 : 20,587.57 = 20,587.57 : x
2. Step 2: Convert to fraction form
   13,684.55/20,587.57 = 20,587.57/x
3. Step 3: Cross multiply
   13,684.55x = 20,587.57 × 20,587.57
4. Step 4: Simplify right side
   13,684.55x = 423,848,051.37
5. Step 5: Solve for x
   x = 423,848,051.37/13,684.55
6. Step 6: Final answer
   x = 30,972.75