Finding the Fourth Proportional to 1,665.13, 2,499.41 and 1,226.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.13 : 2,499.41 = 1,226.87 : x
2. Step 2: Convert to fraction form
   1,665.13/2,499.41 = 1,226.87/x
3. Step 3: Cross multiply
   1,665.13x = 2,499.41 × 1,226.87
4. Step 4: Simplify right side
   1,665.13x = 3,066,441.72
5. Step 5: Solve for x
   x = 3,066,441.72/1,665.13
6. Step 6: Final answer
   x = 1,841.57