Finding the Fourth Proportional to 1,034.12, 1,427.04 and 641.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.12 : 1,427.04 = 641.04 : x
2. Step 2: Convert to fraction form
   1,034.12/1,427.04 = 641.04/x
3. Step 3: Cross multiply
   1,034.12x = 1,427.04 × 641.04
4. Step 4: Simplify right side
   1,034.12x = 914,789.72
5. Step 5: Solve for x
   x = 914,789.72/1,034.12
6. Step 6: Final answer
   x = 884.61