Finding the Third Proportional to 59,104.69 and 128,256.33

Step by Step Solution

1. Step 1: Write the proportion equation
   59,104.69 : 128,256.33 = 128,256.33 : x
2. Step 2: Convert to fraction form
   59,104.69/128,256.33 = 128,256.33/x
3. Step 3: Cross multiply
   59,104.69x = 128,256.33 × 128,256.33
4. Step 4: Simplify right side
   59,104.69x = 16,449,685,704.11
5. Step 5: Solve for x
   x = 16,449,685,704.11/59,104.69
6. Step 6: Final answer
   x = 278,314.40