Finding the Fourth Proportional to 138,189.72, 206,206.83 and 123,296.28

Step by Step Solution

1. Step 1: Write the proportion equation
   138,189.72 : 206,206.83 = 123,296.28 : x
2. Step 2: Convert to fraction form
   138,189.72/206,206.83 = 123,296.28/x
3. Step 3: Cross multiply
   138,189.72x = 206,206.83 × 123,296.28
4. Step 4: Simplify right side
   138,189.72x = 25,424,535,049.59
5. Step 5: Solve for x
   x = 25,424,535,049.59/138,189.72
6. Step 6: Final answer
   x = 183,982.82