Finding the Fourth Proportional to 2,877.57, 4,310.31 and 1,318.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.57 : 4,310.31 = 1,318.89 : x
2. Step 2: Convert to fraction form
   2,877.57/4,310.31 = 1,318.89/x
3. Step 3: Cross multiply
   2,877.57x = 4,310.31 × 1,318.89
4. Step 4: Simplify right side
   2,877.57x = 5,684,824.76
5. Step 5: Solve for x
   x = 5,684,824.76/2,877.57
6. Step 6: Final answer
   x = 1,975.56