Finding the Fourth Proportional to 5,196.31, 7,789.85 and 1,908.63

Step by Step Solution

1. Step 1: Write the proportion equation
   5,196.31 : 7,789.85 = 1,908.63 : x
2. Step 2: Convert to fraction form
   5,196.31/7,789.85 = 1,908.63/x
3. Step 3: Cross multiply
   5,196.31x = 7,789.85 × 1,908.63
4. Step 4: Simplify right side
   5,196.31x = 14,867,939.02
5. Step 5: Solve for x
   x = 14,867,939.02/5,196.31
6. Step 6: Final answer
   x = 2,861.25