Finding the Fourth Proportional to 12,256.84, 18,379.86 and 3,489.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,256.84 : 18,379.86 = 3,489.76 : x
2. Step 2: Convert to fraction form
   12,256.84/18,379.86 = 3,489.76/x
3. Step 3: Cross multiply
   12,256.84x = 18,379.86 × 3,489.76
4. Step 4: Simplify right side
   12,256.84x = 64,141,300.23
5. Step 5: Solve for x
   x = 64,141,300.23/12,256.84
6. Step 6: Final answer
   x = 5,233.10