Finding the Fourth Proportional to 103,628.69, 155,446.37 and 28,749.59

Step by Step Solution

1. Step 1: Write the proportion equation
   103,628.69 : 155,446.37 = 28,749.59 : x
2. Step 2: Convert to fraction form
   103,628.69/155,446.37 = 28,749.59/x
3. Step 3: Cross multiply
   103,628.69x = 155,446.37 × 28,749.59
4. Step 4: Simplify right side
   103,628.69x = 4,469,019,404.49
5. Step 5: Solve for x
   x = 4,469,019,404.49/103,628.69
6. Step 6: Final answer
   x = 43,125.31