Finding the Fourth Proportional to 12,243.90, 18,368.55 and 3,924.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,243.90 : 18,368.55 = 3,924.30 : x
2. Step 2: Convert to fraction form
   12,243.90/18,368.55 = 3,924.30/x
3. Step 3: Cross multiply
   12,243.90x = 18,368.55 × 3,924.30
4. Step 4: Simplify right side
   12,243.90x = 72,083,700.77
5. Step 5: Solve for x
   x = 72,083,700.77/12,243.90
6. Step 6: Final answer
   x = 5,887.32