Finding the Fourth Proportional to 21,037.69, 29,029.89 and 12,422.53

Step by Step Solution

1. Step 1: Write the proportion equation
   21,037.69 : 29,029.89 = 12,422.53 : x
2. Step 2: Convert to fraction form
   21,037.69/29,029.89 = 12,422.53/x
3. Step 3: Cross multiply
   21,037.69x = 29,029.89 × 12,422.53
4. Step 4: Simplify right side
   21,037.69x = 360,624,679.42
5. Step 5: Solve for x
   x = 360,624,679.42/21,037.69
6. Step 6: Final answer
   x = 17,141.84