Finding the Fourth Proportional to 1,401.57, 1,934.22 and 870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.57 : 1,934.22 = 870.75 : x
2. Step 2: Convert to fraction form
   1,401.57/1,934.22 = 870.75/x
3. Step 3: Cross multiply
   1,401.57x = 1,934.22 × 870.75
4. Step 4: Simplify right side
   1,401.57x = 1,684,225.33
5. Step 5: Solve for x
   x = 1,684,225.33/1,401.57
6. Step 6: Final answer
   x = 1,201.67