Finding the Fourth Proportional to 21,019.33, 29,000.37 and 12,517.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.33 : 29,000.37 = 12,517.12 : x
2. Step 2: Convert to fraction form
   21,019.33/29,000.37 = 12,517.12/x
3. Step 3: Cross multiply
   21,019.33x = 29,000.37 × 12,517.12
4. Step 4: Simplify right side
   21,019.33x = 363,001,111.33
5. Step 5: Solve for x
   x = 363,001,111.33/21,019.33
6. Step 6: Final answer
   x = 17,269.87