Finding the Third Proportional to 5,404.50 and 8,345.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,404.50 : 8,345.25 = 8,345.25 : x
2. Step 2: Convert to fraction form
   5,404.50/8,345.25 = 8,345.25/x
3. Step 3: Cross multiply
   5,404.50x = 8,345.25 × 8,345.25
4. Step 4: Simplify right side
   5,404.50x = 69,643,197.56
5. Step 5: Solve for x
   x = 69,643,197.56/5,404.50
6. Step 6: Final answer
   x = 12,886.15