Finding the Fourth Proportional to 90,149.25, 135,290.31 and 42,764.48

Step by Step Solution

1. Step 1: Write the proportion equation
   90,149.25 : 135,290.31 = 42,764.48 : x
2. Step 2: Convert to fraction form
   90,149.25/135,290.31 = 42,764.48/x
3. Step 3: Cross multiply
   90,149.25x = 135,290.31 × 42,764.48
4. Step 4: Simplify right side
   90,149.25x = 5,785,619,542.37
5. Step 5: Solve for x
   x = 5,785,619,542.37/90,149.25
6. Step 6: Final answer
   x = 64,178.24