Finding the Fourth Proportional to 78,778.69, 108,715.87 and 42,968.69

Step by Step Solution

1. Step 1: Write the proportion equation
   78,778.69 : 108,715.87 = 42,968.69 : x
2. Step 2: Convert to fraction form
   78,778.69/108,715.87 = 42,968.69/x
3. Step 3: Cross multiply
   78,778.69x = 108,715.87 × 42,968.69
4. Step 4: Simplify right side
   78,778.69x = 4,671,378,244.32
5. Step 5: Solve for x
   x = 4,671,378,244.32/78,778.69
6. Step 6: Final answer
   x = 59,297.49