Finding the Fourth Proportional to 1,002.36, 1,380.18 and 877.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.36 : 1,380.18 = 877.32 : x
2. Step 2: Convert to fraction form
   1,002.36/1,380.18 = 877.32/x
3. Step 3: Cross multiply
   1,002.36x = 1,380.18 × 877.32
4. Step 4: Simplify right side
   1,002.36x = 1,210,859.52
5. Step 5: Solve for x
   x = 1,210,859.52/1,002.36
6. Step 6: Final answer
   x = 1,208.01