Finding the Fourth Proportional to 2,211.39, 3,051.69 and 1,279.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.39 : 3,051.69 = 1,279.89 : x
2. Step 2: Convert to fraction form
   2,211.39/3,051.69 = 1,279.89/x
3. Step 3: Cross multiply
   2,211.39x = 3,051.69 × 1,279.89
4. Step 4: Simplify right side
   2,211.39x = 3,905,827.51
5. Step 5: Solve for x
   x = 3,905,827.51/2,211.39
6. Step 6: Final answer
   x = 1,766.23