Finding the Fourth Proportional to 2,310.72, 3,465.69 and 666.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,310.72 : 3,465.69 = 666.89 : x
2. Step 2: Convert to fraction form
   2,310.72/3,465.69 = 666.89/x
3. Step 3: Cross multiply
   2,310.72x = 3,465.69 × 666.89
4. Step 4: Simplify right side
   2,310.72x = 2,311,216.68
5. Step 5: Solve for x
   x = 2,311,216.68/2,310.72
6. Step 6: Final answer
   x = 1,000.21