Finding the Fourth Proportional to 49,328, 73,986.56 and 12,392

Step by Step Solution

1. Step 1: Write the proportion equation
   49,328 : 73,986.56 = 12,392 : x
2. Step 2: Convert to fraction form
   49,328/73,986.56 = 12,392/x
3. Step 3: Cross multiply
   49,328x = 73,986.56 × 12,392
4. Step 4: Simplify right side
   49,328x = 916,841,451.52
5. Step 5: Solve for x
   x = 916,841,451.52/49,328
6. Step 6: Final answer
   x = 18,586.63