Finding the Third Proportional to 59,506.50 and 128,808

Step by Step Solution

1. Step 1: Write the proportion equation
   59,506.50 : 128,808 = 128,808 : x
2. Step 2: Convert to fraction form
   59,506.50/128,808 = 128,808/x
3. Step 3: Cross multiply
   59,506.50x = 128,808 × 128,808
4. Step 4: Simplify right side
   59,506.50x = 16,591,500,864
5. Step 5: Solve for x
   x = 16,591,500,864/59,506.50
6. Step 6: Final answer
   x = 278,818.29