Finding the Third Proportional to 3,558 and 7,789.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558 : 7,789.50 = 7,789.50 : x
2. Step 2: Convert to fraction form
   3,558/7,789.50 = 7,789.50/x
3. Step 3: Cross multiply
   3,558x = 7,789.50 × 7,789.50
4. Step 4: Simplify right side
   3,558x = 60,676,310.25
5. Step 5: Solve for x
   x = 60,676,310.25/3,558
6. Step 6: Final answer
   x = 17,053.49