Finding the Fourth Proportional to 12,315.48, 18,475.98 and 4,923.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,315.48 : 18,475.98 = 4,923.42 : x
2. Step 2: Convert to fraction form
   12,315.48/18,475.98 = 4,923.42/x
3. Step 3: Cross multiply
   12,315.48x = 18,475.98 × 4,923.42
4. Step 4: Simplify right side
   12,315.48x = 90,965,009.45
5. Step 5: Solve for x
   x = 90,965,009.45/12,315.48
6. Step 6: Final answer
   x = 7,386.23