Finding the Fourth Proportional to 2,211.09, 3,051.55 and 1,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,211.09 : 3,051.55 = 1,216.45 : x
2. Step 2: Convert to fraction form
   2,211.09/3,051.55 = 1,216.45/x
3. Step 3: Cross multiply
   2,211.09x = 3,051.55 × 1,216.45
4. Step 4: Simplify right side
   2,211.09x = 3,712,058.00
5. Step 5: Solve for x
   x = 3,712,058.00/2,211.09
6. Step 6: Final answer
   x = 1,678.84