Finding the Fourth Proportional to 21,784.69, 30,062.89 and 12,353.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.69 : 30,062.89 = 12,353.25 : x
2. Step 2: Convert to fraction form
   21,784.69/30,062.89 = 12,353.25/x
3. Step 3: Cross multiply
   21,784.69x = 30,062.89 × 12,353.25
4. Step 4: Simplify right side
   21,784.69x = 371,374,395.89
5. Step 5: Solve for x
   x = 371,374,395.89/21,784.69
6. Step 6: Final answer
   x = 17,047.50