Finding the Fourth Proportional to 21,142, 29,098.28 and 18,123.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142 : 29,098.28 = 18,123.94 : x
2. Step 2: Convert to fraction form
   21,142/29,098.28 = 18,123.94/x
3. Step 3: Cross multiply
   21,142x = 29,098.28 × 18,123.94
4. Step 4: Simplify right side
   21,142x = 527,375,480.82
5. Step 5: Solve for x
   x = 527,375,480.82/21,142
6. Step 6: Final answer
   x = 24,944.45