Finding the Fourth Proportional to 128,162.27, 175,579.40 and 123,370.45

Step by Step Solution

1. Step 1: Write the proportion equation
   128,162.27 : 175,579.40 = 123,370.45 : x
2. Step 2: Convert to fraction form
   128,162.27/175,579.40 = 123,370.45/x
3. Step 3: Cross multiply
   128,162.27x = 175,579.40 × 123,370.45
4. Step 4: Simplify right side
   128,162.27x = 21,661,308,532.93
5. Step 5: Solve for x
   x = 21,661,308,532.93/128,162.27
6. Step 6: Final answer
   x = 169,014.70