Finding the Fourth Proportional to 128,411.30, 179,425.90 and 128,411.30

Step by Step Solution

1. Step 1: Write the proportion equation
   128,411.30 : 179,425.90 = 128,411.30 : x
2. Step 2: Convert to fraction form
   128,411.30/179,425.90 = 128,411.30/x
3. Step 3: Cross multiply
   128,411.30x = 179,425.90 × 128,411.30
4. Step 4: Simplify right side
   128,411.30x = 23,040,313,072.67
5. Step 5: Solve for x
   x = 23,040,313,072.67/128,411.30
6. Step 6: Final answer
   x = 179,425.90