Finding the Fourth Proportional to 12,272.46, 18,408.31 and 3,507.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,272.46 : 18,408.31 = 3,507.40 : x
2. Step 2: Convert to fraction form
   12,272.46/18,408.31 = 3,507.40/x
3. Step 3: Cross multiply
   12,272.46x = 18,408.31 × 3,507.40
4. Step 4: Simplify right side
   12,272.46x = 64,565,340.47
5. Step 5: Solve for x
   x = 64,565,340.47/12,272.46
6. Step 6: Final answer
   x = 5,260.99