Finding the Fourth Proportional to 31,388.98, 43,350.78 and 19,480.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,388.98 : 43,350.78 = 19,480.72 : x
2. Step 2: Convert to fraction form
   31,388.98/43,350.78 = 19,480.72/x
3. Step 3: Cross multiply
   31,388.98x = 43,350.78 × 19,480.72
4. Step 4: Simplify right side
   31,388.98x = 844,504,406.96
5. Step 5: Solve for x
   x = 844,504,406.96/31,388.98
6. Step 6: Final answer
   x = 26,904.49