Finding the Third Proportional to 59,293 and 128,428

Step by Step Solution

1. Step 1: Write the proportion equation
   59,293 : 128,428 = 128,428 : x
2. Step 2: Convert to fraction form
   59,293/128,428 = 128,428/x
3. Step 3: Cross multiply
   59,293x = 128,428 × 128,428
4. Step 4: Simplify right side
   59,293x = 16,493,751,184
5. Step 5: Solve for x
   x = 16,493,751,184/59,293
6. Step 6: Final answer
   x = 278,173.67