Finding the Fourth Proportional to 2,478.69, 3,420.69 and 1,416.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.69 : 3,420.69 = 1,416.63 : x
2. Step 2: Convert to fraction form
   2,478.69/3,420.69 = 1,416.63/x
3. Step 3: Cross multiply
   2,478.69x = 3,420.69 × 1,416.63
4. Step 4: Simplify right side
   2,478.69x = 4,845,834.97
5. Step 5: Solve for x
   x = 4,845,834.97/2,478.69
6. Step 6: Final answer
   x = 1,955.00