Finding the Fourth Proportional to 21,547.89, 29,735.91 and 12,116.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,547.89 : 29,735.91 = 12,116.25 : x
2. Step 2: Convert to fraction form
   21,547.89/29,735.91 = 12,116.25/x
3. Step 3: Cross multiply
   21,547.89x = 29,735.91 × 12,116.25
4. Step 4: Simplify right side
   21,547.89x = 360,287,719.54
5. Step 5: Solve for x
   x = 360,287,719.54/21,547.89
6. Step 6: Final answer
   x = 16,720.32