Finding the Fourth Proportional to 12,141.64, 18,216.90 and 5,123.41

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.64 : 18,216.90 = 5,123.41 : x
2. Step 2: Convert to fraction form
   12,141.64/18,216.90 = 5,123.41/x
3. Step 3: Cross multiply
   12,141.64x = 18,216.90 × 5,123.41
4. Step 4: Simplify right side
   12,141.64x = 93,332,647.63
5. Step 5: Solve for x
   x = 93,332,647.63/12,141.64
6. Step 6: Final answer
   x = 7,686.99