Finding the Fourth Proportional to 11,478.82, 17,215.96 and 3,156.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,478.82 : 17,215.96 = 3,156.69 : x
2. Step 2: Convert to fraction form
   11,478.82/17,215.96 = 3,156.69/x
3. Step 3: Cross multiply
   11,478.82x = 17,215.96 × 3,156.69
4. Step 4: Simplify right side
   11,478.82x = 54,345,354.80
5. Step 5: Solve for x
   x = 54,345,354.80/11,478.82
6. Step 6: Final answer
   x = 4,734.40