Finding the Fourth Proportional to 40,573.98, 60,857.15 and 28,778.31

Step by Step Solution

1. Step 1: Write the proportion equation
   40,573.98 : 60,857.15 = 28,778.31 : x
2. Step 2: Convert to fraction form
   40,573.98/60,857.15 = 28,778.31/x
3. Step 3: Cross multiply
   40,573.98x = 60,857.15 × 28,778.31
4. Step 4: Simplify right side
   40,573.98x = 1,751,365,784.52
5. Step 5: Solve for x
   x = 1,751,365,784.52/40,573.98
6. Step 6: Final answer
   x = 43,164.75