Finding the Fourth Proportional to 12,141.90, 18,216.23 and 4,748.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.90 : 18,216.23 = 4,748.42 : x
2. Step 2: Convert to fraction form
   12,141.90/18,216.23 = 4,748.42/x
3. Step 3: Cross multiply
   12,141.90x = 18,216.23 × 4,748.42
4. Step 4: Simplify right side
   12,141.90x = 86,498,332.66
5. Step 5: Solve for x
   x = 86,498,332.66/12,141.90
6. Step 6: Final answer
   x = 7,123.95