Finding the Fourth Proportional to 1,112.64, 1,667.36 and 624.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.64 : 1,667.36 = 624.96 : x
2. Step 2: Convert to fraction form
   1,112.64/1,667.36 = 624.96/x
3. Step 3: Cross multiply
   1,112.64x = 1,667.36 × 624.96
4. Step 4: Simplify right side
   1,112.64x = 1,042,033.31
5. Step 5: Solve for x
   x = 1,042,033.31/1,112.64
6. Step 6: Final answer
   x = 936.54