Finding the Third Proportional to 13,704.19 and 20,657.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,704.19 : 20,657.53 = 20,657.53 : x
2. Step 2: Convert to fraction form
   13,704.19/20,657.53 = 20,657.53/x
3. Step 3: Cross multiply
   13,704.19x = 20,657.53 × 20,657.53
4. Step 4: Simplify right side
   13,704.19x = 426,733,597.34
5. Step 5: Solve for x
   x = 426,733,597.34/13,704.19
6. Step 6: Final answer
   x = 31,138.92