Finding the Fourth Proportional to 30,606.42, 45,902.06 and 8,418.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,606.42 : 45,902.06 = 8,418.72 : x
2. Step 2: Convert to fraction form
   30,606.42/45,902.06 = 8,418.72/x
3. Step 3: Cross multiply
   30,606.42x = 45,902.06 × 8,418.72
4. Step 4: Simplify right side
   30,606.42x = 386,436,590.56
5. Step 5: Solve for x
   x = 386,436,590.56/30,606.42
6. Step 6: Final answer
   x = 12,626.00