Finding the Fourth Proportional to 42,042.42, 58,022.64 and 31,413.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,042.42 : 58,022.64 = 31,413.60 : x
2. Step 2: Convert to fraction form
   42,042.42/58,022.64 = 31,413.60/x
3. Step 3: Cross multiply
   42,042.42x = 58,022.64 × 31,413.60
4. Step 4: Simplify right side
   42,042.42x = 1,822,700,003.90
5. Step 5: Solve for x
   x = 1,822,700,003.90/42,042.42
6. Step 6: Final answer
   x = 43,353.83