Finding the Fourth Proportional to 49,870.14, 68,810.71 and 31,728.07

Step by Step Solution

1. Step 1: Write the proportion equation
   49,870.14 : 68,810.71 = 31,728.07 : x
2. Step 2: Convert to fraction form
   49,870.14/68,810.71 = 31,728.07/x
3. Step 3: Cross multiply
   49,870.14x = 68,810.71 × 31,728.07
4. Step 4: Simplify right side
   49,870.14x = 2,183,230,772.28
5. Step 5: Solve for x
   x = 2,183,230,772.28/49,870.14
6. Step 6: Final answer
   x = 43,778.32