Finding the Fourth Proportional to 20,887.98, 31,339 and 7,741.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,887.98 : 31,339 = 7,741.42 : x
2. Step 2: Convert to fraction form
   20,887.98/31,339 = 7,741.42/x
3. Step 3: Cross multiply
   20,887.98x = 31,339 × 7,741.42
4. Step 4: Simplify right side
   20,887.98x = 242,608,361.38
5. Step 5: Solve for x
   x = 242,608,361.38/20,887.98
6. Step 6: Final answer
   x = 11,614.74