Finding the Fourth Proportional to 1,613.34, 2,419.81 and 626.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,613.34 : 2,419.81 = 626.15 : x
2. Step 2: Convert to fraction form
   1,613.34/2,419.81 = 626.15/x
3. Step 3: Cross multiply
   1,613.34x = 2,419.81 × 626.15
4. Step 4: Simplify right side
   1,613.34x = 1,515,168.52
5. Step 5: Solve for x
   x = 1,515,168.52/1,613.34
6. Step 6: Final answer
   x = 939.15