Finding the Fourth Proportional to 1,669.92, 2,304.71 and 1,007.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669.92 : 2,304.71 = 1,007.15 : x
2. Step 2: Convert to fraction form
   1,669.92/2,304.71 = 1,007.15/x
3. Step 3: Cross multiply
   1,669.92x = 2,304.71 × 1,007.15
4. Step 4: Simplify right side
   1,669.92x = 2,321,172.12
5. Step 5: Solve for x
   x = 2,321,172.12/1,669.92
6. Step 6: Final answer
   x = 1,389.99