Finding the Fourth Proportional to 1,007.67, 1,510.29 and 718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.67 : 1,510.29 = 718.50 : x
2. Step 2: Convert to fraction form
   1,007.67/1,510.29 = 718.50/x
3. Step 3: Cross multiply
   1,007.67x = 1,510.29 × 718.50
4. Step 4: Simplify right side
   1,007.67x = 1,085,143.37
5. Step 5: Solve for x
   x = 1,085,143.37/1,007.67
6. Step 6: Final answer
   x = 1,076.88