Finding the Fourth Proportional to 78,420.29, 108,219.78 and 42,610.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,420.29 : 108,219.78 = 42,610.42 : x
2. Step 2: Convert to fraction form
   78,420.29/108,219.78 = 42,610.42/x
3. Step 3: Cross multiply
   78,420.29x = 108,219.78 × 42,610.42
4. Step 4: Simplify right side
   78,420.29x = 4,611,290,413.38
5. Step 5: Solve for x
   x = 4,611,290,413.38/78,420.29
6. Step 6: Final answer
   x = 58,802.27