Finding the Fourth Proportional to 12,607.61, 17,398.49 and 7,018.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,607.61 : 17,398.49 = 7,018.61 : x
2. Step 2: Convert to fraction form
   12,607.61/17,398.49 = 7,018.61/x
3. Step 3: Cross multiply
   12,607.61x = 17,398.49 × 7,018.61
4. Step 4: Simplify right side
   12,607.61x = 122,113,093.81
5. Step 5: Solve for x
   x = 122,113,093.81/12,607.61
6. Step 6: Final answer
   x = 9,685.67