Finding the Fourth Proportional to 1,034.46, 1,427.67 and 641.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,034.46 : 1,427.67 = 641.82 : x
2. Step 2: Convert to fraction form
   1,034.46/1,427.67 = 641.82/x
3. Step 3: Cross multiply
   1,034.46x = 1,427.67 × 641.82
4. Step 4: Simplify right side
   1,034.46x = 916,307.16
5. Step 5: Solve for x
   x = 916,307.16/1,034.46
6. Step 6: Final answer
   x = 885.78