Finding the Third Proportional to 9,123.89 and 13,685.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,123.89 : 13,685.84 = 13,685.84 : x
2. Step 2: Convert to fraction form
   9,123.89/13,685.84 = 13,685.84/x
3. Step 3: Cross multiply
   9,123.89x = 13,685.84 × 13,685.84
4. Step 4: Simplify right side
   9,123.89x = 187,302,105.31
5. Step 5: Solve for x
   x = 187,302,105.31/9,123.89
6. Step 6: Final answer
   x = 20,528.75