Finding the Fourth Proportional to 11,456, 17,191.68 and 4,160

Step by Step Solution

1. Step 1: Write the proportion equation
   11,456 : 17,191.68 = 4,160 : x
2. Step 2: Convert to fraction form
   11,456/17,191.68 = 4,160/x
3. Step 3: Cross multiply
   11,456x = 17,191.68 × 4,160
4. Step 4: Simplify right side
   11,456x = 71,517,388.80
5. Step 5: Solve for x
   x = 71,517,388.80/11,456
6. Step 6: Final answer
   x = 6,242.79