Finding the Fourth Proportional to 2,211.34, 3,051.72 and 1,216.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.34 : 3,051.72 = 1,216.71 : x
2. Step 2: Convert to fraction form
   2,211.34/3,051.72 = 1,216.71/x
3. Step 3: Cross multiply
   2,211.34x = 3,051.72 × 1,216.71
4. Step 4: Simplify right side
   2,211.34x = 3,713,058.24
5. Step 5: Solve for x
   x = 3,713,058.24/2,211.34
6. Step 6: Final answer
   x = 1,679.10