Finding the Fourth Proportional to 1,121.89, 1,548.18 and 624.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121.89 : 1,548.18 = 624.52 : x
2. Step 2: Convert to fraction form
   1,121.89/1,548.18 = 624.52/x
3. Step 3: Cross multiply
   1,121.89x = 1,548.18 × 624.52
4. Step 4: Simplify right side
   1,121.89x = 966,869.37
5. Step 5: Solve for x
   x = 966,869.37/1,121.89
6. Step 6: Final answer
   x = 861.82