Finding the Fourth Proportional to 40,105.08, 55,335.96 and 30,542.76

Step by Step Solution

1. Step 1: Write the proportion equation
   40,105.08 : 55,335.96 = 30,542.76 : x
2. Step 2: Convert to fraction form
   40,105.08/55,335.96 = 30,542.76/x
3. Step 3: Cross multiply
   40,105.08x = 55,335.96 × 30,542.76
4. Step 4: Simplify right side
   40,105.08x = 1,690,112,945.65
5. Step 5: Solve for x
   x = 1,690,112,945.65/40,105.08
6. Step 6: Final answer
   x = 42,142.12