Finding the Fourth Proportional to 11,678.56, 17,513.72 and 3,885.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,678.56 : 17,513.72 = 3,885.28 : x
2. Step 2: Convert to fraction form
   11,678.56/17,513.72 = 3,885.28/x
3. Step 3: Cross multiply
   11,678.56x = 17,513.72 × 3,885.28
4. Step 4: Simplify right side
   11,678.56x = 68,045,706.04
5. Step 5: Solve for x
   x = 68,045,706.04/11,678.56
6. Step 6: Final answer
   x = 5,826.55