Finding the Fourth Proportional to 1,665.21, 2,296.46 and 1,134.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.21 : 2,296.46 = 1,134.89 : x
2. Step 2: Convert to fraction form
   1,665.21/2,296.46 = 1,134.89/x
3. Step 3: Cross multiply
   1,665.21x = 2,296.46 × 1,134.89
4. Step 4: Simplify right side
   1,665.21x = 2,606,220.84
5. Step 5: Solve for x
   x = 2,606,220.84/1,665.21
6. Step 6: Final answer
   x = 1,565.10