Finding the Fourth Proportional to 1,416.72, 1,955.04 and 778.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,416.72 : 1,955.04 = 778.68 : x
2. Step 2: Convert to fraction form
   1,416.72/1,955.04 = 778.68/x
3. Step 3: Cross multiply
   1,416.72x = 1,955.04 × 778.68
4. Step 4: Simplify right side
   1,416.72x = 1,522,350.55
5. Step 5: Solve for x
   x = 1,522,350.55/1,416.72
6. Step 6: Final answer
   x = 1,074.56