Finding the Fourth Proportional to 1,148.49, 1,584.89 and 624.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,148.49 : 1,584.89 = 624.51 : x
2. Step 2: Convert to fraction form
   1,148.49/1,584.89 = 624.51/x
3. Step 3: Cross multiply
   1,148.49x = 1,584.89 × 624.51
4. Step 4: Simplify right side
   1,148.49x = 989,776.53
5. Step 5: Solve for x
   x = 989,776.53/1,148.49
6. Step 6: Final answer
   x = 861.81