Finding the Third Proportional to 1,558.62 and 3,390.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.62 : 3,390.61 = 3,390.61 : x
2. Step 2: Convert to fraction form
   1,558.62/3,390.61 = 3,390.61/x
3. Step 3: Cross multiply
   1,558.62x = 3,390.61 × 3,390.61
4. Step 4: Simplify right side
   1,558.62x = 11,496,231.93
5. Step 5: Solve for x
   x = 11,496,231.93/1,558.62
6. Step 6: Final answer
   x = 7,375.92