Finding the Fourth Proportional to 1,436.60, 1,982.46 and 878.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.60 : 1,982.46 = 878.01 : x
2. Step 2: Convert to fraction form
   1,436.60/1,982.46 = 878.01/x
3. Step 3: Cross multiply
   1,436.60x = 1,982.46 × 878.01
4. Step 4: Simplify right side
   1,436.60x = 1,740,605.40
5. Step 5: Solve for x
   x = 1,740,605.40/1,436.60
6. Step 6: Final answer
   x = 1,211.61