Finding the Third Proportional to 59,661 and 128,663.25

Step by Step Solution

1. Step 1: Write the proportion equation
   59,661 : 128,663.25 = 128,663.25 : x
2. Step 2: Convert to fraction form
   59,661/128,663.25 = 128,663.25/x
3. Step 3: Cross multiply
   59,661x = 128,663.25 × 128,663.25
4. Step 4: Simplify right side
   59,661x = 16,554,231,900.56
5. Step 5: Solve for x
   x = 16,554,231,900.56/59,661
6. Step 6: Final answer
   x = 277,471.58