Finding the Fourth Proportional to 2,331.80, 3,217.57 and 1,436.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,331.80 : 3,217.57 = 1,436.00 : x
2. Step 2: Convert to fraction form
   2,331.80/3,217.57 = 1,436.00/x
3. Step 3: Cross multiply
   2,331.80x = 3,217.57 × 1,436.00
4. Step 4: Simplify right side
   2,331.80x = 4,620,446.07
5. Step 5: Solve for x
   x = 4,620,446.07/2,331.80
6. Step 6: Final answer
   x = 1,981.50