Finding the Fourth Proportional to 1,034.37, 1,427.49 and 641.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.37 : 1,427.49 = 641.25 : x
2. Step 2: Convert to fraction form
   1,034.37/1,427.49 = 641.25/x
3. Step 3: Cross multiply
   1,034.37x = 1,427.49 × 641.25
4. Step 4: Simplify right side
   1,034.37x = 915,377.96
5. Step 5: Solve for x
   x = 915,377.96/1,034.37
6. Step 6: Final answer
   x = 884.96