Finding the Fourth Proportional to 1,873.69, 2,586.81 and 1,666.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,873.69 : 2,586.81 = 1,666.12 : x
2. Step 2: Convert to fraction form
   1,873.69/2,586.81 = 1,666.12/x
3. Step 3: Cross multiply
   1,873.69x = 2,586.81 × 1,666.12
4. Step 4: Simplify right side
   1,873.69x = 4,309,935.88
5. Step 5: Solve for x
   x = 4,309,935.88/1,873.69
6. Step 6: Final answer
   x = 2,300.24