Finding the Fourth Proportional to 2,817.86, 4,223.10 and 1,258.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,817.86 : 4,223.10 = 1,258.34 : x
2. Step 2: Convert to fraction form
   2,817.86/4,223.10 = 1,258.34/x
3. Step 3: Cross multiply
   2,817.86x = 4,223.10 × 1,258.34
4. Step 4: Simplify right side
   2,817.86x = 5,314,095.65
5. Step 5: Solve for x
   x = 5,314,095.65/2,817.86
6. Step 6: Final answer
   x = 1,885.86