Finding the Fourth Proportional to 21,189.31, 31,785.18 and 8,041.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,189.31 : 31,785.18 = 8,041.39 : x
2. Step 2: Convert to fraction form
   21,189.31/31,785.18 = 8,041.39/x
3. Step 3: Cross multiply
   21,189.31x = 31,785.18 × 8,041.39
4. Step 4: Simplify right side
   21,189.31x = 255,597,028.60
5. Step 5: Solve for x
   x = 255,597,028.60/21,189.31
6. Step 6: Final answer
   x = 12,062.55