Finding the Third Proportional to 59,658.19 and 128,656.69

Step by Step Solution

1. Step 1: Write the proportion equation
   59,658.19 : 128,656.69 = 128,656.69 : x
2. Step 2: Convert to fraction form
   59,658.19/128,656.69 = 128,656.69/x
3. Step 3: Cross multiply
   59,658.19x = 128,656.69 × 128,656.69
4. Step 4: Simplify right side
   59,658.19x = 16,552,543,238.47
5. Step 5: Solve for x
   x = 16,552,543,238.47/59,658.19
6. Step 6: Final answer
   x = 277,456.35