Finding the Fourth Proportional to 2,870.45, 4,306.13 and 1,227

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.45 : 4,306.13 = 1,227 : x
2. Step 2: Convert to fraction form
   2,870.45/4,306.13 = 1,227/x
3. Step 3: Cross multiply
   2,870.45x = 4,306.13 × 1,227
4. Step 4: Simplify right side
   2,870.45x = 5,283,621.51
5. Step 5: Solve for x
   x = 5,283,621.51/2,870.45
6. Step 6: Final answer
   x = 1,840.69