Finding the Fourth Proportional to 20,741.16, 31,117.89 and 8,254.07

Step by Step Solution

1. Step 1: Write the proportion equation
   20,741.16 : 31,117.89 = 8,254.07 : x
2. Step 2: Convert to fraction form
   20,741.16/31,117.89 = 8,254.07/x
3. Step 3: Cross multiply
   20,741.16x = 31,117.89 × 8,254.07
4. Step 4: Simplify right side
   20,741.16x = 256,849,086.72
5. Step 5: Solve for x
   x = 256,849,086.72/20,741.16
6. Step 6: Final answer
   x = 12,383.54