Finding the Fourth Proportional to 1,665.89, 2,496.45 and 1,223.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.89 : 2,496.45 = 1,223.67 : x
2. Step 2: Convert to fraction form
   1,665.89/2,496.45 = 1,223.67/x
3. Step 3: Cross multiply
   1,665.89x = 2,496.45 × 1,223.67
4. Step 4: Simplify right side
   1,665.89x = 3,054,824.00
5. Step 5: Solve for x
   x = 3,054,824.00/1,665.89
6. Step 6: Final answer
   x = 1,833.75