Finding the Fourth Proportional to 2,503.91, 3,456.80 and 1,665.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.91 : 3,456.80 = 1,665.75 : x
2. Step 2: Convert to fraction form
   2,503.91/3,456.80 = 1,665.75/x
3. Step 3: Cross multiply
   2,503.91x = 3,456.80 × 1,665.75
4. Step 4: Simplify right side
   2,503.91x = 5,758,156.27
5. Step 5: Solve for x
   x = 5,758,156.27/2,503.91
6. Step 6: Final answer
   x = 2,299.67