Finding the Fourth Proportional to 2,436.84, 3,646.36 and 2,085.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,436.84 : 3,646.36 = 2,085.72 : x
2. Step 2: Convert to fraction form
   2,436.84/3,646.36 = 2,085.72/x
3. Step 3: Cross multiply
   2,436.84x = 3,646.36 × 2,085.72
4. Step 4: Simplify right side
   2,436.84x = 7,605,285.98
5. Step 5: Solve for x
   x = 7,605,285.98/2,436.84
6. Step 6: Final answer
   x = 3,120.96