Finding the Fourth Proportional to 21,667.08, 29,900.34 and 12,235.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.08 : 29,900.34 = 12,235.08 : x
2. Step 2: Convert to fraction form
   21,667.08/29,900.34 = 12,235.08/x
3. Step 3: Cross multiply
   21,667.08x = 29,900.34 × 12,235.08
4. Step 4: Simplify right side
   21,667.08x = 365,833,051.93
5. Step 5: Solve for x
   x = 365,833,051.93/21,667.08
6. Step 6: Final answer
   x = 16,884.28