Finding the Fourth Proportional to 110,309.42, 165,490.05 and 31,424.78

Step by Step Solution

1. Step 1: Write the proportion equation
   110,309.42 : 165,490.05 = 31,424.78 : x
2. Step 2: Convert to fraction form
   110,309.42/165,490.05 = 31,424.78/x
3. Step 3: Cross multiply
   110,309.42x = 165,490.05 × 31,424.78
4. Step 4: Simplify right side
   110,309.42x = 5,200,488,413.44
5. Step 5: Solve for x
   x = 5,200,488,413.44/110,309.42
6. Step 6: Final answer
   x = 47,144.55