Finding the Fourth Proportional to 105,540.54, 145,645.86 and 57,794.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,540.54 : 145,645.86 = 57,794.82 : x
2. Step 2: Convert to fraction form
   105,540.54/145,645.86 = 57,794.82/x
3. Step 3: Cross multiply
   105,540.54x = 145,645.86 × 57,794.82
4. Step 4: Simplify right side
   105,540.54x = 8,417,576,262.45
5. Step 5: Solve for x
   x = 8,417,576,262.45/105,540.54
6. Step 6: Final answer
   x = 79,756.80