Finding the Fourth Proportional to 78,578.09, 108,440.06 and 42,770.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,578.09 : 108,440.06 = 42,770.42 : x
2. Step 2: Convert to fraction form
   78,578.09/108,440.06 = 42,770.42/x
3. Step 3: Cross multiply
   78,578.09x = 108,440.06 × 42,770.42
4. Step 4: Simplify right side
   78,578.09x = 4,638,026,911.03
5. Step 5: Solve for x
   x = 4,638,026,911.03/78,578.09
6. Step 6: Final answer
   x = 59,024.43