Finding the Fourth Proportional to 21,016.74, 29,003.16 and 11,585.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.74 : 29,003.16 = 11,585.34 : x
2. Step 2: Convert to fraction form
   21,016.74/29,003.16 = 11,585.34/x
3. Step 3: Cross multiply
   21,016.74x = 29,003.16 × 11,585.34
4. Step 4: Simplify right side
   21,016.74x = 336,011,469.67
5. Step 5: Solve for x
   x = 336,011,469.67/21,016.74
6. Step 6: Final answer
   x = 15,987.80