Finding the Fourth Proportional to 1,121.34, 1,547.47 and 624.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,121.34 : 1,547.47 = 624.03 : x
2. Step 2: Convert to fraction form
   1,121.34/1,547.47 = 624.03/x
3. Step 3: Cross multiply
   1,121.34x = 1,547.47 × 624.03
4. Step 4: Simplify right side
   1,121.34x = 965,667.70
5. Step 5: Solve for x
   x = 965,667.70/1,121.34
6. Step 6: Final answer
   x = 861.17