Finding the Fourth Proportional to 21,541.01, 29,726.87 and 12,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,541.01 : 29,726.87 = 12,109.50 : x
2. Step 2: Convert to fraction form
   21,541.01/29,726.87 = 12,109.50/x
3. Step 3: Cross multiply
   21,541.01x = 29,726.87 × 12,109.50
4. Step 4: Simplify right side
   21,541.01x = 359,977,471.72
5. Step 5: Solve for x
   x = 359,977,471.72/21,541.01
6. Step 6: Final answer
   x = 16,711.27