Finding the Fourth Proportional to 2,166.29, 3,246.65 and 1,581.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,166.29 : 3,246.65 = 1,581.25 : x
2. Step 2: Convert to fraction form
   2,166.29/3,246.65 = 1,581.25/x
3. Step 3: Cross multiply
   2,166.29x = 3,246.65 × 1,581.25
4. Step 4: Simplify right side
   2,166.29x = 5,133,741.17
5. Step 5: Solve for x
   x = 5,133,741.17/2,166.29
6. Step 6: Final answer
   x = 2,369.83