Finding the Fourth Proportional to 12,483.12, 18,728.54 and 7,491.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,483.12 : 18,728.54 = 7,491.06 : x
2. Step 2: Convert to fraction form
   12,483.12/18,728.54 = 7,491.06/x
3. Step 3: Cross multiply
   12,483.12x = 18,728.54 × 7,491.06
4. Step 4: Simplify right side
   12,483.12x = 140,296,616.85
5. Step 5: Solve for x
   x = 140,296,616.85/12,483.12
6. Step 6: Final answer
   x = 11,238.91