Finding the Fourth Proportional to 1,086.76, 1,630.38 and 356.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.76 : 1,630.38 = 356.38 : x
2. Step 2: Convert to fraction form
   1,086.76/1,630.38 = 356.38/x
3. Step 3: Cross multiply
   1,086.76x = 1,630.38 × 356.38
4. Step 4: Simplify right side
   1,086.76x = 581,034.82
5. Step 5: Solve for x
   x = 581,034.82/1,086.76
6. Step 6: Final answer
   x = 534.65