Finding the Fourth Proportional to 10,922.82, 16,381.35 and 3,129.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,922.82 : 16,381.35 = 3,129.78 : x
2. Step 2: Convert to fraction form
   10,922.82/16,381.35 = 3,129.78/x
3. Step 3: Cross multiply
   10,922.82x = 16,381.35 × 3,129.78
4. Step 4: Simplify right side
   10,922.82x = 51,270,021.60
5. Step 5: Solve for x
   x = 51,270,021.60/10,922.82
6. Step 6: Final answer
   x = 4,693.84