Finding the Third Proportional to 5,305.50 and 12,389.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,305.50 : 12,389.25 = 12,389.25 : x
2. Step 2: Convert to fraction form
   5,305.50/12,389.25 = 12,389.25/x
3. Step 3: Cross multiply
   5,305.50x = 12,389.25 × 12,389.25
4. Step 4: Simplify right side
   5,305.50x = 153,493,515.56
5. Step 5: Solve for x
   x = 153,493,515.56/5,305.50
6. Step 6: Final answer
   x = 28,931.02