Finding the Fourth Proportional to 13,667.42, 20,426.24 and 9,977.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.42 : 20,426.24 = 9,977.42 : x
2. Step 2: Convert to fraction form
   13,667.42/20,426.24 = 9,977.42/x
3. Step 3: Cross multiply
   13,667.42x = 20,426.24 × 9,977.42
4. Step 4: Simplify right side
   13,667.42x = 203,801,060.90
5. Step 5: Solve for x
   x = 203,801,060.90/13,667.42
6. Step 6: Final answer
   x = 14,911.46