Finding the Third Proportional to 10,740 and 15,123

Step by Step Solution

1. Step 1: Write the proportion equation
   10,740 : 15,123 = 15,123 : x
2. Step 2: Convert to fraction form
   10,740/15,123 = 15,123/x
3. Step 3: Cross multiply
   10,740x = 15,123 × 15,123
4. Step 4: Simplify right side
   10,740x = 228,705,129
5. Step 5: Solve for x
   x = 228,705,129/10,740
6. Step 6: Final answer
   x = 21,294.70