Finding the Fourth Proportional to 12,148.38, 18,212.76 and 5,123.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,148.38 : 18,212.76 = 5,123.86 : x
2. Step 2: Convert to fraction form
   12,148.38/18,212.76 = 5,123.86/x
3. Step 3: Cross multiply
   12,148.38x = 18,212.76 × 5,123.86
4. Step 4: Simplify right side
   12,148.38x = 93,319,632.45
5. Step 5: Solve for x
   x = 93,319,632.45/12,148.38
6. Step 6: Final answer
   x = 7,681.65