Finding the Fourth Proportional to 20,398.56, 30,598.18 and 5,607.39

Step by Step Solution

1. Step 1: Write the proportion equation
   20,398.56 : 30,598.18 = 5,607.39 : x
2. Step 2: Convert to fraction form
   20,398.56/30,598.18 = 5,607.39/x
3. Step 3: Cross multiply
   20,398.56x = 30,598.18 × 5,607.39
4. Step 4: Simplify right side
   20,398.56x = 171,575,928.55
5. Step 5: Solve for x
   x = 171,575,928.55/20,398.56
6. Step 6: Final answer
   x = 8,411.18