Finding the Fourth Proportional to 12,145.30, 18,223.62 and 4,747.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.30 : 18,223.62 = 4,747.84 : x
2. Step 2: Convert to fraction form
   12,145.30/18,223.62 = 4,747.84/x
3. Step 3: Cross multiply
   12,145.30x = 18,223.62 × 4,747.84
4. Step 4: Simplify right side
   12,145.30x = 86,522,831.98
5. Step 5: Solve for x
   x = 86,522,831.98/12,145.30
6. Step 6: Final answer
   x = 7,123.98