Finding the Third Proportional to 18,657.84 and 28,123.45

Step by Step Solution

1. Step 1: Write the proportion equation
   18,657.84 : 28,123.45 = 28,123.45 : x
2. Step 2: Convert to fraction form
   18,657.84/28,123.45 = 28,123.45/x
3. Step 3: Cross multiply
   18,657.84x = 28,123.45 × 28,123.45
4. Step 4: Simplify right side
   18,657.84x = 790,928,615.67
5. Step 5: Solve for x
   x = 790,928,615.67/18,657.84
6. Step 6: Final answer
   x = 42,391.21