Finding the Fourth Proportional to 1,782.05, 2,458.74 and 1,222.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,782.05 : 2,458.74 = 1,222.67 : x
2. Step 2: Convert to fraction form
   1,782.05/2,458.74 = 1,222.67/x
3. Step 3: Cross multiply
   1,782.05x = 2,458.74 × 1,222.67
4. Step 4: Simplify right side
   1,782.05x = 3,006,215.34
5. Step 5: Solve for x
   x = 3,006,215.34/1,782.05
6. Step 6: Final answer
   x = 1,686.94