Finding the Third Proportional to 5,557.50 and 8,355.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,557.50 : 8,355.38 = 8,355.38 : x
2. Step 2: Convert to fraction form
   5,557.50/8,355.38 = 8,355.38/x
3. Step 3: Cross multiply
   5,557.50x = 8,355.38 × 8,355.38
4. Step 4: Simplify right side
   5,557.50x = 69,812,291.39
5. Step 5: Solve for x
   x = 69,812,291.39/5,557.50
6. Step 6: Final answer
   x = 12,561.82