Finding the Fourth Proportional to 12,865.34, 19,296.05 and 3,506.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865.34 : 19,296.05 = 3,506.09 : x
2. Step 2: Convert to fraction form
   12,865.34/19,296.05 = 3,506.09/x
3. Step 3: Cross multiply
   12,865.34x = 19,296.05 × 3,506.09
4. Step 4: Simplify right side
   12,865.34x = 67,653,687.94
5. Step 5: Solve for x
   x = 67,653,687.94/12,865.34
6. Step 6: Final answer
   x = 5,258.60