Finding the Fourth Proportional to 20,927.33, 31,366.59 and 7,771.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,927.33 : 31,366.59 = 7,771.31 : x
2. Step 2: Convert to fraction form
   20,927.33/31,366.59 = 7,771.31/x
3. Step 3: Cross multiply
   20,927.33x = 31,366.59 × 7,771.31
4. Step 4: Simplify right side
   20,927.33x = 243,759,494.53
5. Step 5: Solve for x
   x = 243,759,494.53/20,927.33
6. Step 6: Final answer
   x = 11,647.90