Finding the Fourth Proportional to 1,002.07, 1,382.33 and 628.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.07 : 1,382.33 = 628.34 : x
2. Step 2: Convert to fraction form
   1,002.07/1,382.33 = 628.34/x
3. Step 3: Cross multiply
   1,002.07x = 1,382.33 × 628.34
4. Step 4: Simplify right side
   1,002.07x = 868,570.09
5. Step 5: Solve for x
   x = 868,570.09/1,002.07
6. Step 6: Final answer
   x = 866.78