Finding the Fourth Proportional to 19,282.42, 28,940.01 and 13,749.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,282.42 : 28,940.01 = 13,749.31 : x
2. Step 2: Convert to fraction form
   19,282.42/28,940.01 = 13,749.31/x
3. Step 3: Cross multiply
   19,282.42x = 28,940.01 × 13,749.31
4. Step 4: Simplify right side
   19,282.42x = 397,905,168.89
5. Step 5: Solve for x
   x = 397,905,168.89/19,282.42
6. Step 6: Final answer
   x = 20,635.64