Finding the Fourth Proportional to 1,086.02, 1,629.48 and 436.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.02 : 1,629.48 = 436.59 : x
2. Step 2: Convert to fraction form
   1,086.02/1,629.48 = 436.59/x
3. Step 3: Cross multiply
   1,086.02x = 1,629.48 × 436.59
4. Step 4: Simplify right side
   1,086.02x = 711,414.67
5. Step 5: Solve for x
   x = 711,414.67/1,086.02
6. Step 6: Final answer
   x = 655.07