Finding the Fourth Proportional to 78,569.98, 108,424.50 and 42,759.23

Step by Step Solution

1. Step 1: Write the proportion equation
   78,569.98 : 108,424.50 = 42,759.23 : x
2. Step 2: Convert to fraction form
   78,569.98/108,424.50 = 42,759.23/x
3. Step 3: Cross multiply
   78,569.98x = 108,424.50 × 42,759.23
4. Step 4: Simplify right side
   78,569.98x = 4,636,147,550.93
5. Step 5: Solve for x
   x = 4,636,147,550.93/78,569.98
6. Step 6: Final answer
   x = 59,006.60