Finding the Fourth Proportional to 20,111.35, 30,167.10 and 8,416.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,111.35 : 30,167.10 = 8,416.37 : x
2. Step 2: Convert to fraction form
   20,111.35/30,167.10 = 8,416.37/x
3. Step 3: Cross multiply
   20,111.35x = 30,167.10 × 8,416.37
4. Step 4: Simplify right side
   20,111.35x = 253,897,475.43
5. Step 5: Solve for x
   x = 253,897,475.43/20,111.35
6. Step 6: Final answer
   x = 12,624.59