Finding the Fourth Proportional to 49,336.75, 74,039.15 and 42,756.31

Step by Step Solution

1. Step 1: Write the proportion equation
   49,336.75 : 74,039.15 = 42,756.31 : x
2. Step 2: Convert to fraction form
   49,336.75/74,039.15 = 42,756.31/x
3. Step 3: Cross multiply
   49,336.75x = 74,039.15 × 42,756.31
4. Step 4: Simplify right side
   49,336.75x = 3,165,640,849.54
5. Step 5: Solve for x
   x = 3,165,640,849.54/49,336.75
6. Step 6: Final answer
   x = 64,163.95