Finding the Fourth Proportional to 31,397.39, 43,295.80 and 21,848.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,397.39 : 43,295.80 = 21,848.09 : x
2. Step 2: Convert to fraction form
   31,397.39/43,295.80 = 21,848.09/x
3. Step 3: Cross multiply
   31,397.39x = 43,295.80 × 21,848.09
4. Step 4: Simplify right side
   31,397.39x = 945,930,535.02
5. Step 5: Solve for x
   x = 945,930,535.02/31,397.39
6. Step 6: Final answer
   x = 30,127.68