Finding the Fourth Proportional to 78,519.57, 108,357.57 and 42,709.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,519.57 : 108,357.57 = 42,709.56 : x
2. Step 2: Convert to fraction form
   78,519.57/108,357.57 = 42,709.56/x
3. Step 3: Cross multiply
   78,519.57x = 108,357.57 × 42,709.56
4. Step 4: Simplify right side
   78,519.57x = 4,627,904,137.37
5. Step 5: Solve for x
   x = 4,627,904,137.37/78,519.57
6. Step 6: Final answer
   x = 58,939.50