Finding the Fourth Proportional to 128,096.33, 175,491.15 and 123,306.09

Step by Step Solution

1. Step 1: Write the proportion equation
   128,096.33 : 175,491.15 = 123,306.09 : x
2. Step 2: Convert to fraction form
   128,096.33/175,491.15 = 123,306.09/x
3. Step 3: Cross multiply
   128,096.33x = 175,491.15 × 123,306.09
4. Step 4: Simplify right side
   128,096.33x = 21,639,127,536.10
5. Step 5: Solve for x
   x = 21,639,127,536.10/128,096.33
6. Step 6: Final answer
   x = 168,928.56