Finding the Fourth Proportional to 2,140.82, 3,207.87 and 1,153.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140.82 : 3,207.87 = 1,153.62 : x
2. Step 2: Convert to fraction form
   2,140.82/3,207.87 = 1,153.62/x
3. Step 3: Cross multiply
   2,140.82x = 3,207.87 × 1,153.62
4. Step 4: Simplify right side
   2,140.82x = 3,700,662.99
5. Step 5: Solve for x
   x = 3,700,662.99/2,140.82
6. Step 6: Final answer
   x = 1,728.62