Finding the Fourth Proportional to 1,086.86, 1,630.38 and 356.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.86 : 1,630.38 = 356.42 : x
2. Step 2: Convert to fraction form
   1,086.86/1,630.38 = 356.42/x
3. Step 3: Cross multiply
   1,086.86x = 1,630.38 × 356.42
4. Step 4: Simplify right side
   1,086.86x = 581,091.89
5. Step 5: Solve for x
   x = 581,091.89/1,086.86
6. Step 6: Final answer
   x = 534.65