Finding the Fourth Proportional to 1,379.46, 1,897.67 and 1,210.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.46 : 1,897.67 = 1,210.67 : x
2. Step 2: Convert to fraction form
   1,379.46/1,897.67 = 1,210.67/x
3. Step 3: Cross multiply
   1,379.46x = 1,897.67 × 1,210.67
4. Step 4: Simplify right side
   1,379.46x = 2,297,456.66
5. Step 5: Solve for x
   x = 2,297,456.66/1,379.46
6. Step 6: Final answer
   x = 1,665.48