Finding the Fourth Proportional to 128,164.27, 175,582.13 and 123,372.45

Step by Step Solution

1. Step 1: Write the proportion equation
   128,164.27 : 175,582.13 = 123,372.45 : x
2. Step 2: Convert to fraction form
   128,164.27/175,582.13 = 123,372.45/x
3. Step 3: Cross multiply
   128,164.27x = 175,582.13 × 123,372.45
4. Step 4: Simplify right side
   128,164.27x = 21,661,997,554.32
5. Step 5: Solve for x
   x = 21,661,997,554.32/128,164.27
6. Step 6: Final answer
   x = 169,017.45