Finding the Fourth Proportional to 2,877.96, 4,315.56 and 1,317.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.96 : 4,315.56 = 1,317.49 : x
2. Step 2: Convert to fraction form
   2,877.96/4,315.56 = 1,317.49/x
3. Step 3: Cross multiply
   2,877.96x = 4,315.56 × 1,317.49
4. Step 4: Simplify right side
   2,877.96x = 5,685,707.14
5. Step 5: Solve for x
   x = 5,685,707.14/2,877.96
6. Step 6: Final answer
   x = 1,975.61