Finding the Fourth Proportional to 21,062.94, 29,072.46 and 13,100.64

Step by Step Solution

1. Step 1: Write the proportion equation
   21,062.94 : 29,072.46 = 13,100.64 : x
2. Step 2: Convert to fraction form
   21,062.94/29,072.46 = 13,100.64/x
3. Step 3: Cross multiply
   21,062.94x = 29,072.46 × 13,100.64
4. Step 4: Simplify right side
   21,062.94x = 380,867,832.37
5. Step 5: Solve for x
   x = 380,867,832.37/21,062.94
6. Step 6: Final answer
   x = 18,082.37