Finding the Fourth Proportional to 21,460.34, 29,615.22 and 12,028.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,460.34 : 29,615.22 = 12,028.91 : x
2. Step 2: Convert to fraction form
   21,460.34/29,615.22 = 12,028.91/x
3. Step 3: Cross multiply
   21,460.34x = 29,615.22 × 12,028.91
4. Step 4: Simplify right side
   21,460.34x = 356,238,667.93
5. Step 5: Solve for x
   x = 356,238,667.93/21,460.34
6. Step 6: Final answer
   x = 16,599.86