Finding the Fourth Proportional to 1,074.15, 1,610.89 and 554.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.15 : 1,610.89 = 554.09 : x
2. Step 2: Convert to fraction form
   1,074.15/1,610.89 = 554.09/x
3. Step 3: Cross multiply
   1,074.15x = 1,610.89 × 554.09
4. Step 4: Simplify right side
   1,074.15x = 892,567.22
5. Step 5: Solve for x
   x = 892,567.22/1,074.15
6. Step 6: Final answer
   x = 830.95