Finding the Fourth Proportional to 21,822.58, 30,114.84 and 12,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,822.58 : 30,114.84 = 12,390.52 : x
2. Step 2: Convert to fraction form
   21,822.58/30,114.84 = 12,390.52/x
3. Step 3: Cross multiply
   21,822.58x = 30,114.84 × 12,390.52
4. Step 4: Simplify right side
   21,822.58x = 373,138,527.32
5. Step 5: Solve for x
   x = 373,138,527.32/21,822.58
6. Step 6: Final answer
   x = 17,098.74