Finding the Fourth Proportional to 2,770.17, 3,822.72 and 1,511.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,770.17 : 3,822.72 = 1,511.21 : x
2. Step 2: Convert to fraction form
   2,770.17/3,822.72 = 1,511.21/x
3. Step 3: Cross multiply
   2,770.17x = 3,822.72 × 1,511.21
4. Step 4: Simplify right side
   2,770.17x = 5,776,919.33
5. Step 5: Solve for x
   x = 5,776,919.33/2,770.17
6. Step 6: Final answer
   x = 2,085.40