Finding the Fourth Proportional to 1,086.98, 1,630.56 and 356.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.98 : 1,630.56 = 356.54 : x
2. Step 2: Convert to fraction form
   1,086.98/1,630.56 = 356.54/x
3. Step 3: Cross multiply
   1,086.98x = 1,630.56 × 356.54
4. Step 4: Simplify right side
   1,086.98x = 581,359.86
5. Step 5: Solve for x
   x = 581,359.86/1,086.98
6. Step 6: Final answer
   x = 534.84