Finding the Fourth Proportional to 12,298.30, 18,443.16 and 7,611.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,298.30 : 18,443.16 = 7,611.17 : x
2. Step 2: Convert to fraction form
   12,298.30/18,443.16 = 7,611.17/x
3. Step 3: Cross multiply
   12,298.30x = 18,443.16 × 7,611.17
4. Step 4: Simplify right side
   12,298.30x = 140,373,933.88
5. Step 5: Solve for x
   x = 140,373,933.88/12,298.30
6. Step 6: Final answer
   x = 11,414.09