Finding the Fourth Proportional to 30,608.07, 45,906.72 and 8,416.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,608.07 : 45,906.72 = 8,416.10 : x
2. Step 2: Convert to fraction form
   30,608.07/45,906.72 = 8,416.10/x
3. Step 3: Cross multiply
   30,608.07x = 45,906.72 × 8,416.10
4. Step 4: Simplify right side
   30,608.07x = 386,355,316.66
5. Step 5: Solve for x
   x = 386,355,316.66/30,608.07
6. Step 6: Final answer
   x = 12,622.66