Finding the Fourth Proportional to 21,164.82, 31,747.31 and 5,369.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,164.82 : 31,747.31 = 5,369.87 : x
2. Step 2: Convert to fraction form
   21,164.82/31,747.31 = 5,369.87/x
3. Step 3: Cross multiply
   21,164.82x = 31,747.31 × 5,369.87
4. Step 4: Simplify right side
   21,164.82x = 170,478,741.96
5. Step 5: Solve for x
   x = 170,478,741.96/21,164.82
6. Step 6: Final answer
   x = 8,054.82