Finding the Fourth Proportional to 2,421.69, 3,342.17 and 1,427.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.69 : 3,342.17 = 1,427.29 : x
2. Step 2: Convert to fraction form
   2,421.69/3,342.17 = 1,427.29/x
3. Step 3: Cross multiply
   2,421.69x = 3,342.17 × 1,427.29
4. Step 4: Simplify right side
   2,421.69x = 4,770,245.82
5. Step 5: Solve for x
   x = 4,770,245.82/2,421.69
6. Step 6: Final answer
   x = 1,969.80