Finding the Fourth Proportional to 12,315.34, 18,476.25 and 3,550.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,315.34 : 18,476.25 = 3,550.78 : x
2. Step 2: Convert to fraction form
   12,315.34/18,476.25 = 3,550.78/x
3. Step 3: Cross multiply
   12,315.34x = 18,476.25 × 3,550.78
4. Step 4: Simplify right side
   12,315.34x = 65,605,098.98
5. Step 5: Solve for x
   x = 65,605,098.98/12,315.34
6. Step 6: Final answer
   x = 5,327.10