Finding the Fourth Proportional to 12,398.09, 18,598.31 and 4,078.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,398.09 : 18,598.31 = 4,078.17 : x
2. Step 2: Convert to fraction form
   12,398.09/18,598.31 = 4,078.17/x
3. Step 3: Cross multiply
   12,398.09x = 18,598.31 × 4,078.17
4. Step 4: Simplify right side
   12,398.09x = 75,847,069.89
5. Step 5: Solve for x
   x = 75,847,069.89/12,398.09
6. Step 6: Final answer
   x = 6,117.64