Finding the Fourth Proportional to 78,618.24, 108,495.24 and 42,809.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,618.24 : 108,495.24 = 42,809.76 : x
2. Step 2: Convert to fraction form
   78,618.24/108,495.24 = 42,809.76/x
3. Step 3: Cross multiply
   78,618.24x = 108,495.24 × 42,809.76
4. Step 4: Simplify right side
   78,618.24x = 4,644,655,185.54
5. Step 5: Solve for x
   x = 4,644,655,185.54/78,618.24
6. Step 6: Final answer
   x = 59,078.60