Finding the Fourth Proportional to 2,503.91, 3,456.61 and 1,666.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,503.91 : 3,456.61 = 1,666.01 : x
2. Step 2: Convert to fraction form
   2,503.91/3,456.61 = 1,666.01/x
3. Step 3: Cross multiply
   2,503.91x = 3,456.61 × 1,666.01
4. Step 4: Simplify right side
   2,503.91x = 5,758,751.30
5. Step 5: Solve for x
   x = 5,758,751.30/2,503.91
6. Step 6: Final answer
   x = 2,299.90