Finding the Fourth Proportional to 1,115.82, 1,539.83 and 673.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,115.82 : 1,539.83 = 673.71 : x
2. Step 2: Convert to fraction form
   1,115.82/1,539.83 = 673.71/x
3. Step 3: Cross multiply
   1,115.82x = 1,539.83 × 673.71
4. Step 4: Simplify right side
   1,115.82x = 1,037,387.80
5. Step 5: Solve for x
   x = 1,037,387.80/1,115.82
6. Step 6: Final answer
   x = 929.71