Finding the Fourth Proportional to 21,825.55, 30,118.11 and 12,393.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,825.55 : 30,118.11 = 12,393.50 : x
2. Step 2: Convert to fraction form
   21,825.55/30,118.11 = 12,393.50/x
3. Step 3: Cross multiply
   21,825.55x = 30,118.11 × 12,393.50
4. Step 4: Simplify right side
   21,825.55x = 373,268,796.29
5. Step 5: Solve for x
   x = 373,268,796.29/21,825.55
6. Step 6: Final answer
   x = 17,102.38