Finding the Fourth Proportional to 3,061.49, 4,588.82 and 1,211.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.49 : 4,588.82 = 1,211.20 : x
2. Step 2: Convert to fraction form
   3,061.49/4,588.82 = 1,211.20/x
3. Step 3: Cross multiply
   3,061.49x = 4,588.82 × 1,211.20
4. Step 4: Simplify right side
   3,061.49x = 5,557,961.26
5. Step 5: Solve for x
   x = 5,557,961.26/3,061.49
6. Step 6: Final answer
   x = 1,815.45