Finding the Fourth Proportional to 21,052.82, 29,052.14 and 12,667.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,052.82 : 29,052.14 = 12,667.70 : x
2. Step 2: Convert to fraction form
   21,052.82/29,052.14 = 12,667.70/x
3. Step 3: Cross multiply
   21,052.82x = 29,052.14 × 12,667.70
4. Step 4: Simplify right side
   21,052.82x = 368,023,793.88
5. Step 5: Solve for x
   x = 368,023,793.88/21,052.82
6. Step 6: Final answer
   x = 17,480.97