Finding the Fourth Proportional to 1,401.50, 1,933.81 and 870.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,401.50 : 1,933.81 = 870.53 : x
2. Step 2: Convert to fraction form
   1,401.50/1,933.81 = 870.53/x
3. Step 3: Cross multiply
   1,401.50x = 1,933.81 × 870.53
4. Step 4: Simplify right side
   1,401.50x = 1,683,441.00
5. Step 5: Solve for x
   x = 1,683,441.00/1,401.50
6. Step 6: Final answer
   x = 1,201.17