Finding the Fourth Proportional to 21,645.11, 32,485.89 and 8,506.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,645.11 : 32,485.89 = 8,506.71 : x
2. Step 2: Convert to fraction form
   21,645.11/32,485.89 = 8,506.71/x
3. Step 3: Cross multiply
   21,645.11x = 32,485.89 × 8,506.71
4. Step 4: Simplify right side
   21,645.11x = 276,348,045.32
5. Step 5: Solve for x
   x = 276,348,045.32/21,645.11
6. Step 6: Final answer
   x = 12,767.23