Finding the Fourth Proportional to 2,869.18, 4,300.17 and 1,223.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,869.18 : 4,300.17 = 1,223.80 : x
2. Step 2: Convert to fraction form
   2,869.18/4,300.17 = 1,223.80/x
3. Step 3: Cross multiply
   2,869.18x = 4,300.17 × 1,223.80
4. Step 4: Simplify right side
   2,869.18x = 5,262,537.30
5. Step 5: Solve for x
   x = 5,262,537.30/2,869.18
6. Step 6: Final answer
   x = 1,834.16