Finding the Fourth Proportional to 31,842.28, 43,930.98 and 21,889

Step by Step Solution

1. Step 1: Write the proportion equation
   31,842.28 : 43,930.98 = 21,889 : x
2. Step 2: Convert to fraction form
   31,842.28/43,930.98 = 21,889/x
3. Step 3: Cross multiply
   31,842.28x = 43,930.98 × 21,889
4. Step 4: Simplify right side
   31,842.28x = 961,605,221.22
5. Step 5: Solve for x
   x = 961,605,221.22/31,842.28
6. Step 6: Final answer
   x = 30,199.01