Finding the Fourth Proportional to 78,234.57, 107,963.55 and 42,424.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,234.57 : 107,963.55 = 42,424.47 : x
2. Step 2: Convert to fraction form
   78,234.57/107,963.55 = 42,424.47/x
3. Step 3: Cross multiply
   78,234.57x = 107,963.55 × 42,424.47
4. Step 4: Simplify right side
   78,234.57x = 4,580,296,388.07
5. Step 5: Solve for x
   x = 4,580,296,388.07/78,234.57
6. Step 6: Final answer
   x = 58,545.68