Finding the Fourth Proportional to 2,877.15, 4,317.86 and 2,138.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,877.15 : 4,317.86 = 2,138.48 : x
2. Step 2: Convert to fraction form
   2,877.15/4,317.86 = 2,138.48/x
3. Step 3: Cross multiply
   2,877.15x = 4,317.86 × 2,138.48
4. Step 4: Simplify right side
   2,877.15x = 9,233,633.03
5. Step 5: Solve for x
   x = 9,233,633.03/2,877.15
6. Step 6: Final answer
   x = 3,209.30