Finding the Fourth Proportional to 2,210.69, 3,313.82 and 1,420.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.69 : 3,313.82 = 1,420.67 : x
2. Step 2: Convert to fraction form
   2,210.69/3,313.82 = 1,420.67/x
3. Step 3: Cross multiply
   2,210.69x = 3,313.82 × 1,420.67
4. Step 4: Simplify right side
   2,210.69x = 4,707,855.62
5. Step 5: Solve for x
   x = 4,707,855.62/2,210.69
6. Step 6: Final answer
   x = 2,129.59