Finding the Fourth Proportional to 107,399.97, 161,087.49 and 28,520.37

Step by Step Solution

1. Step 1: Write the proportion equation
   107,399.97 : 161,087.49 = 28,520.37 : x
2. Step 2: Convert to fraction form
   107,399.97/161,087.49 = 28,520.37/x
3. Step 3: Cross multiply
   107,399.97x = 161,087.49 × 28,520.37
4. Step 4: Simplify right side
   107,399.97x = 4,594,274,817.17
5. Step 5: Solve for x
   x = 4,594,274,817.17/107,399.97
6. Step 6: Final answer
   x = 42,777.24