Finding the Fourth Proportional to 1,165.08, 1,607.94 and 641.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.08 : 1,607.94 = 641.10 : x
2. Step 2: Convert to fraction form
   1,165.08/1,607.94 = 641.10/x
3. Step 3: Cross multiply
   1,165.08x = 1,607.94 × 641.10
4. Step 4: Simplify right side
   1,165.08x = 1,030,850.33
5. Step 5: Solve for x
   x = 1,030,850.33/1,165.08
6. Step 6: Final answer
   x = 884.79