Finding the Fourth Proportional to 2,478.20, 3,419.82 and 1,430.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.20 : 3,419.82 = 1,430.06 : x
2. Step 2: Convert to fraction form
   2,478.20/3,419.82 = 1,430.06/x
3. Step 3: Cross multiply
   2,478.20x = 3,419.82 × 1,430.06
4. Step 4: Simplify right side
   2,478.20x = 4,890,530.69
5. Step 5: Solve for x
   x = 4,890,530.69/2,478.20
6. Step 6: Final answer
   x = 1,973.42