Finding the Fourth Proportional to 21,112.04, 29,129.15 and 12,610.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,112.04 : 29,129.15 = 12,610.69 : x
2. Step 2: Convert to fraction form
   21,112.04/29,129.15 = 12,610.69/x
3. Step 3: Cross multiply
   21,112.04x = 29,129.15 × 12,610.69
4. Step 4: Simplify right side
   21,112.04x = 367,338,639.32
5. Step 5: Solve for x
   x = 367,338,639.32/21,112.04
6. Step 6: Final answer
   x = 17,399.48