Finding the Fourth Proportional to 81,469.05, 122,173.61 and 28,147.37

Step by Step Solution

1. Step 1: Write the proportion equation
   81,469.05 : 122,173.61 = 28,147.37 : x
2. Step 2: Convert to fraction form
   81,469.05/122,173.61 = 28,147.37/x
3. Step 3: Cross multiply
   81,469.05x = 122,173.61 × 28,147.37
4. Step 4: Simplify right side
   81,469.05x = 3,438,865,053.30
5. Step 5: Solve for x
   x = 3,438,865,053.30/81,469.05
6. Step 6: Final answer
   x = 42,210.69