Finding the Fourth Proportional to 5,196.77, 7,171.52 and 2,838.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.77 : 7,171.52 = 2,838.90 : x
2. Step 2: Convert to fraction form
   5,196.77/7,171.52 = 2,838.90/x
3. Step 3: Cross multiply
   5,196.77x = 7,171.52 × 2,838.90
4. Step 4: Simplify right side
   5,196.77x = 20,359,228.13
5. Step 5: Solve for x
   x = 20,359,228.13/5,196.77
6. Step 6: Final answer
   x = 3,917.67