Finding the Fourth Proportional to 2,808.69, 4,214.55 and 1,054.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.69 : 4,214.55 = 1,054.89 : x
2. Step 2: Convert to fraction form
   2,808.69/4,214.55 = 1,054.89/x
3. Step 3: Cross multiply
   2,808.69x = 4,214.55 × 1,054.89
4. Step 4: Simplify right side
   2,808.69x = 4,445,886.65
5. Step 5: Solve for x
   x = 4,445,886.65/2,808.69
6. Step 6: Final answer
   x = 1,582.90