Finding the Fourth Proportional to 1,086.86, 1,630.37 and 437.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.86 : 1,630.37 = 437.59 : x
2. Step 2: Convert to fraction form
   1,086.86/1,630.37 = 437.59/x
3. Step 3: Cross multiply
   1,086.86x = 1,630.37 × 437.59
4. Step 4: Simplify right side
   1,086.86x = 713,433.61
5. Step 5: Solve for x
   x = 713,433.61/1,086.86
6. Step 6: Final answer
   x = 656.42