Finding the Fourth Proportional to 128,164.25, 175,582.10 and 123,372.42

Step by Step Solution

1. Step 1: Write the proportion equation
   128,164.25 : 175,582.10 = 123,372.42 : x
2. Step 2: Convert to fraction form
   128,164.25/175,582.10 = 123,372.42/x
3. Step 3: Cross multiply
   128,164.25x = 175,582.10 × 123,372.42
4. Step 4: Simplify right side
   128,164.25x = 21,661,987,968.82
5. Step 5: Solve for x
   x = 21,661,987,968.82/128,164.25
6. Step 6: Final answer
   x = 169,017.40