Finding the Fourth Proportional to 21,371.03, 29,499.86 and 12,873.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,371.03 : 29,499.86 = 12,873.52 : x
2. Step 2: Convert to fraction form
   21,371.03/29,499.86 = 12,873.52/x
3. Step 3: Cross multiply
   21,371.03x = 29,499.86 × 12,873.52
4. Step 4: Simplify right side
   21,371.03x = 379,767,037.71
5. Step 5: Solve for x
   x = 379,767,037.71/21,371.03
6. Step 6: Final answer
   x = 17,770.18