Finding the Fourth Proportional to 1,977.27, 2,728.50 and 1,137.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.27 : 2,728.50 = 1,137.78 : x
2. Step 2: Convert to fraction form
   1,977.27/2,728.50 = 1,137.78/x
3. Step 3: Cross multiply
   1,977.27x = 2,728.50 × 1,137.78
4. Step 4: Simplify right side
   1,977.27x = 3,104,432.73
5. Step 5: Solve for x
   x = 3,104,432.73/1,977.27
6. Step 6: Final answer
   x = 1,570.06