Finding the Fourth Proportional to 22,408.14, 30,921.42 and 12,977.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,408.14 : 30,921.42 = 12,977.31 : x
2. Step 2: Convert to fraction form
   22,408.14/30,921.42 = 12,977.31/x
3. Step 3: Cross multiply
   22,408.14x = 30,921.42 × 12,977.31
4. Step 4: Simplify right side
   22,408.14x = 401,276,852.98
5. Step 5: Solve for x
   x = 401,276,852.98/22,408.14
6. Step 6: Final answer
   x = 17,907.64