Finding the Fourth Proportional to 1,977.06, 2,964.57 and 1,155.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.06 : 2,964.57 = 1,155.57 : x
2. Step 2: Convert to fraction form
   1,977.06/2,964.57 = 1,155.57/x
3. Step 3: Cross multiply
   1,977.06x = 2,964.57 × 1,155.57
4. Step 4: Simplify right side
   1,977.06x = 3,425,768.15
5. Step 5: Solve for x
   x = 3,425,768.15/1,977.06
6. Step 6: Final answer
   x = 1,732.76