Finding the Fourth Proportional to 1,111.61, 1,665.25 and 624.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,111.61 : 1,665.25 = 624.98 : x
2. Step 2: Convert to fraction form
   1,111.61/1,665.25 = 624.98/x
3. Step 3: Cross multiply
   1,111.61x = 1,665.25 × 624.98
4. Step 4: Simplify right side
   1,111.61x = 1,040,738.06
5. Step 5: Solve for x
   x = 1,040,738.06/1,111.61
6. Step 6: Final answer
   x = 936.25