Finding the Fourth Proportional to 12,288.84, 18,427.86 and 3,521.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.84 : 18,427.86 = 3,521.76 : x
2. Step 2: Convert to fraction form
   12,288.84/18,427.86 = 3,521.76/x
3. Step 3: Cross multiply
   12,288.84x = 18,427.86 × 3,521.76
4. Step 4: Simplify right side
   12,288.84x = 64,898,500.23
5. Step 5: Solve for x
   x = 64,898,500.23/12,288.84
6. Step 6: Final answer
   x = 5,281.09