Finding the Fourth Proportional to 21,824.96, 30,118.56 and 12,755.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,824.96 : 30,118.56 = 12,755.60 : x
2. Step 2: Convert to fraction form
   21,824.96/30,118.56 = 12,755.60/x
3. Step 3: Cross multiply
   21,824.96x = 30,118.56 × 12,755.60
4. Step 4: Simplify right side
   21,824.96x = 384,180,303.94
5. Step 5: Solve for x
   x = 384,180,303.94/21,824.96
6. Step 6: Final answer
   x = 17,602.80