Finding the Fourth Proportional to 1,089.59, 1,635.31 and 473.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.59 : 1,635.31 = 473.79 : x
2. Step 2: Convert to fraction form
   1,089.59/1,635.31 = 473.79/x
3. Step 3: Cross multiply
   1,089.59x = 1,635.31 × 473.79
4. Step 4: Simplify right side
   1,089.59x = 774,793.52
5. Step 5: Solve for x
   x = 774,793.52/1,089.59
6. Step 6: Final answer
   x = 711.09