Finding the Fourth Proportional to 21,538.33, 29,718.53 and 12,584.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,538.33 : 29,718.53 = 12,584.10 : x
2. Step 2: Convert to fraction form
   21,538.33/29,718.53 = 12,584.10/x
3. Step 3: Cross multiply
   21,538.33x = 29,718.53 × 12,584.10
4. Step 4: Simplify right side
   21,538.33x = 373,980,890.45
5. Step 5: Solve for x
   x = 373,980,890.45/21,538.33
6. Step 6: Final answer
   x = 17,363.51