Finding the Fourth Proportional to 21,293.16, 31,959.42 and 10,770.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,293.16 : 31,959.42 = 10,770.63 : x
2. Step 2: Convert to fraction form
   21,293.16/31,959.42 = 10,770.63/x
3. Step 3: Cross multiply
   21,293.16x = 31,959.42 × 10,770.63
4. Step 4: Simplify right side
   21,293.16x = 344,223,087.83
5. Step 5: Solve for x
   x = 344,223,087.83/21,293.16
6. Step 6: Final answer
   x = 16,165.90