Finding the Fourth Proportional to 78,567.98, 108,424.78 and 42,758.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,567.98 : 108,424.78 = 42,758.28 : x
2. Step 2: Convert to fraction form
   78,567.98/108,424.78 = 42,758.28/x
3. Step 3: Cross multiply
   78,567.98x = 108,424.78 × 42,758.28
4. Step 4: Simplify right side
   78,567.98x = 4,636,056,995.28
5. Step 5: Solve for x
   x = 4,636,056,995.28/78,567.98
6. Step 6: Final answer
   x = 59,006.96