Finding the Fourth Proportional to 1,089.33, 1,633.98 and 472.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,089.33 : 1,633.98 = 472.71 : x
2. Step 2: Convert to fraction form
   1,089.33/1,633.98 = 472.71/x
3. Step 3: Cross multiply
   1,089.33x = 1,633.98 × 472.71
4. Step 4: Simplify right side
   1,089.33x = 772,398.69
5. Step 5: Solve for x
   x = 772,398.69/1,089.33
6. Step 6: Final answer
   x = 709.06