Finding the Fourth Proportional to 1,317.59, 1,976.42 and 624.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317.59 : 1,976.42 = 624.09 : x
2. Step 2: Convert to fraction form
   1,317.59/1,976.42 = 624.09/x
3. Step 3: Cross multiply
   1,317.59x = 1,976.42 × 624.09
4. Step 4: Simplify right side
   1,317.59x = 1,233,463.96
5. Step 5: Solve for x
   x = 1,233,463.96/1,317.59
6. Step 6: Final answer
   x = 936.15