Finding the Fourth Proportional to 20,404.12, 30,606.54 and 5,612.95

Step by Step Solution

1. Step 1: Write the proportion equation
   20,404.12 : 30,606.54 = 5,612.95 : x
2. Step 2: Convert to fraction form
   20,404.12/30,606.54 = 5,612.95/x
3. Step 3: Cross multiply
   20,404.12x = 30,606.54 × 5,612.95
4. Step 4: Simplify right side
   20,404.12x = 171,792,978.69
5. Step 5: Solve for x
   x = 171,792,978.69/20,404.12
6. Step 6: Final answer
   x = 8,419.52