Finding the Fourth Proportional to 1,112.88, 1,665.81 and 624.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.88 : 1,665.81 = 624.45 : x
2. Step 2: Convert to fraction form
   1,112.88/1,665.81 = 624.45/x
3. Step 3: Cross multiply
   1,112.88x = 1,665.81 × 624.45
4. Step 4: Simplify right side
   1,112.88x = 1,040,215.05
5. Step 5: Solve for x
   x = 1,040,215.05/1,112.88
6. Step 6: Final answer
   x = 934.71