Finding the Fourth Proportional to 42,458.05, 63,626.71 and 31,276.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,458.05 : 63,626.71 = 31,276.81 : x
2. Step 2: Convert to fraction form
   42,458.05/63,626.71 = 31,276.81/x
3. Step 3: Cross multiply
   42,458.05x = 63,626.71 × 31,276.81
4. Step 4: Simplify right side
   42,458.05x = 1,990,040,519.60
5. Step 5: Solve for x
   x = 1,990,040,519.60/42,458.05
6. Step 6: Final answer
   x = 46,870.75