Finding the Fourth Proportional to 78,578.27, 108,440.33 and 42,770.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,578.27 : 108,440.33 = 42,770.60 : x
2. Step 2: Convert to fraction form
   78,578.27/108,440.33 = 42,770.60/x
3. Step 3: Cross multiply
   78,578.27x = 108,440.33 × 42,770.60
4. Step 4: Simplify right side
   78,578.27x = 4,638,057,978.30
5. Step 5: Solve for x
   x = 4,638,057,978.30/78,578.27
6. Step 6: Final answer
   x = 59,024.69