Finding the Fourth Proportional to 1,007.31, 1,508.23 and 713.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.31 : 1,508.23 = 713.62 : x
2. Step 2: Convert to fraction form
   1,007.31/1,508.23 = 713.62/x
3. Step 3: Cross multiply
   1,007.31x = 1,508.23 × 713.62
4. Step 4: Simplify right side
   1,007.31x = 1,076,297.54
5. Step 5: Solve for x
   x = 1,076,297.54/1,007.31
6. Step 6: Final answer
   x = 1,068.49