Finding the Fourth Proportional to 21,312.22, 31,988.04 and 10,789.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,312.22 : 31,988.04 = 10,789.69 : x
2. Step 2: Convert to fraction form
   21,312.22/31,988.04 = 10,789.69/x
3. Step 3: Cross multiply
   21,312.22x = 31,988.04 × 10,789.69
4. Step 4: Simplify right side
   21,312.22x = 345,141,035.31
5. Step 5: Solve for x
   x = 345,141,035.31/21,312.22
6. Step 6: Final answer
   x = 16,194.51