Finding the Fourth Proportional to 45,489.89, 62,789.57 and 28,734.05

Step by Step Solution

1. Step 1: Write the proportion equation
   45,489.89 : 62,789.57 = 28,734.05 : x
2. Step 2: Convert to fraction form
   45,489.89/62,789.57 = 28,734.05/x
3. Step 3: Cross multiply
   45,489.89x = 62,789.57 × 28,734.05
4. Step 4: Simplify right side
   45,489.89x = 1,804,198,643.86
5. Step 5: Solve for x
   x = 1,804,198,643.86/45,489.89
6. Step 6: Final answer
   x = 39,661.53