Finding the Fourth Proportional to 31,858.50, 43,910.54 and 21,769.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,858.50 : 43,910.54 = 21,769.42 : x
2. Step 2: Convert to fraction form
   31,858.50/43,910.54 = 21,769.42/x
3. Step 3: Cross multiply
   31,858.50x = 43,910.54 × 21,769.42
4. Step 4: Simplify right side
   31,858.50x = 955,906,987.69
5. Step 5: Solve for x
   x = 955,906,987.69/31,858.50
6. Step 6: Final answer
   x = 30,004.77