Finding the Fourth Proportional to 2,185.62, 3,279.78 and 1,263

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.62 : 3,279.78 = 1,263 : x
2. Step 2: Convert to fraction form
   2,185.62/3,279.78 = 1,263/x
3. Step 3: Cross multiply
   2,185.62x = 3,279.78 × 1,263
4. Step 4: Simplify right side
   2,185.62x = 4,142,362.14
5. Step 5: Solve for x
   x = 4,142,362.14/2,185.62
6. Step 6: Final answer
   x = 1,895.28