Finding the Fourth Proportional to 2,700.87, 4,050.78 and 945.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,700.87 : 4,050.78 = 945.55 : x
2. Step 2: Convert to fraction form
   2,700.87/4,050.78 = 945.55/x
3. Step 3: Cross multiply
   2,700.87x = 4,050.78 × 945.55
4. Step 4: Simplify right side
   2,700.87x = 3,830,215.03
5. Step 5: Solve for x
   x = 3,830,215.03/2,700.87
6. Step 6: Final answer
   x = 1,418.14