Finding the Third Proportional to 59,116 and 128,600

Step by Step Solution

1. Step 1: Write the proportion equation
   59,116 : 128,600 = 128,600 : x
2. Step 2: Convert to fraction form
   59,116/128,600 = 128,600/x
3. Step 3: Cross multiply
   59,116x = 128,600 × 128,600
4. Step 4: Simplify right side
   59,116x = 16,537,960,000
5. Step 5: Solve for x
   x = 16,537,960,000/59,116
6. Step 6: Final answer
   x = 279,754.38