Finding the Fourth Proportional to 2,880.45, 4,317.57 and 1,236.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.45 : 4,317.57 = 1,236.15 : x
2. Step 2: Convert to fraction form
   2,880.45/4,317.57 = 1,236.15/x
3. Step 3: Cross multiply
   2,880.45x = 4,317.57 × 1,236.15
4. Step 4: Simplify right side
   2,880.45x = 5,337,164.16
5. Step 5: Solve for x
   x = 5,337,164.16/2,880.45
6. Step 6: Final answer
   x = 1,852.89