Finding the Fourth Proportional to 10,922.78, 16,383.93 and 3,131.66

Step by Step Solution

1. Step 1: Write the proportion equation
   10,922.78 : 16,383.93 = 3,131.66 : x
2. Step 2: Convert to fraction form
   10,922.78/16,383.93 = 3,131.66/x
3. Step 3: Cross multiply
   10,922.78x = 16,383.93 × 3,131.66
4. Step 4: Simplify right side
   10,922.78x = 51,308,898.22
5. Step 5: Solve for x
   x = 51,308,898.22/10,922.78
6. Step 6: Final answer
   x = 4,697.42