Finding the Fourth Proportional to 31,548.38, 43,448.18 and 30,859.48

Step by Step Solution

1. Step 1: Write the proportion equation
   31,548.38 : 43,448.18 = 30,859.48 : x
2. Step 2: Convert to fraction form
   31,548.38/43,448.18 = 30,859.48/x
3. Step 3: Cross multiply
   31,548.38x = 43,448.18 × 30,859.48
4. Step 4: Simplify right side
   31,548.38x = 1,340,787,870.21
5. Step 5: Solve for x
   x = 1,340,787,870.21/31,548.38
6. Step 6: Final answer
   x = 42,499.42