Finding the Fourth Proportional to 4,185.72, 6,279.60 and 1,263.86

Step by Step Solution

1. Step 1: Write the proportion equation
   4,185.72 : 6,279.60 = 1,263.86 : x
2. Step 2: Convert to fraction form
   4,185.72/6,279.60 = 1,263.86/x
3. Step 3: Cross multiply
   4,185.72x = 6,279.60 × 1,263.86
4. Step 4: Simplify right side
   4,185.72x = 7,936,503.86
5. Step 5: Solve for x
   x = 7,936,503.86/4,185.72
6. Step 6: Final answer
   x = 1,896.09