Finding the Fourth Proportional to 21,119.00, 29,141.32 and 12,619.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,119.00 : 29,141.32 = 12,619.31 : x
2. Step 2: Convert to fraction form
   21,119.00/29,141.32 = 12,619.31/x
3. Step 3: Cross multiply
   21,119.00x = 29,141.32 × 12,619.31
4. Step 4: Simplify right side
   21,119.00x = 367,743,361.22
5. Step 5: Solve for x
   x = 367,743,361.22/21,119.00
6. Step 6: Final answer
   x = 17,412.92