Finding the Fourth Proportional to 1,007.02, 1,518.18 and 936.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.02 : 1,518.18 = 936.55 : x
2. Step 2: Convert to fraction form
   1,007.02/1,518.18 = 936.55/x
3. Step 3: Cross multiply
   1,007.02x = 1,518.18 × 936.55
4. Step 4: Simplify right side
   1,007.02x = 1,421,839.21
5. Step 5: Solve for x
   x = 1,421,839.21/1,007.02
6. Step 6: Final answer
   x = 1,411.93