Finding the Fourth Proportional to 1,401.62, 1,933.48 and 870.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.62 : 1,933.48 = 870.17 : x
2. Step 2: Convert to fraction form
   1,401.62/1,933.48 = 870.17/x
3. Step 3: Cross multiply
   1,401.62x = 1,933.48 × 870.17
4. Step 4: Simplify right side
   1,401.62x = 1,682,456.29
5. Step 5: Solve for x
   x = 1,682,456.29/1,401.62
6. Step 6: Final answer
   x = 1,200.37