Finding the Fourth Proportional to 21,784.70, 30,062.04 and 12,353.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,784.70 : 30,062.04 = 12,353.60 : x
2. Step 2: Convert to fraction form
   21,784.70/30,062.04 = 12,353.60/x
3. Step 3: Cross multiply
   21,784.70x = 30,062.04 × 12,353.60
4. Step 4: Simplify right side
   21,784.70x = 371,374,417.34
5. Step 5: Solve for x
   x = 371,374,417.34/21,784.70
6. Step 6: Final answer
   x = 17,047.49