Finding the Fourth Proportional to 55,642.63, 76,786.83 and 30,491.59

Step by Step Solution

1. Step 1: Write the proportion equation
   55,642.63 : 76,786.83 = 30,491.59 : x
2. Step 2: Convert to fraction form
   55,642.63/76,786.83 = 30,491.59/x
3. Step 3: Cross multiply
   55,642.63x = 76,786.83 × 30,491.59
4. Step 4: Simplify right side
   55,642.63x = 2,341,352,537.76
5. Step 5: Solve for x
   x = 2,341,352,537.76/55,642.63
6. Step 6: Final answer
   x = 42,078.39