Finding the Fourth Proportional to 2,291.16, 3,160.56 and 1,977.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.16 : 3,160.56 = 1,977.72 : x
2. Step 2: Convert to fraction form
   2,291.16/3,160.56 = 1,977.72/x
3. Step 3: Cross multiply
   2,291.16x = 3,160.56 × 1,977.72
4. Step 4: Simplify right side
   2,291.16x = 6,250,702.72
5. Step 5: Solve for x
   x = 6,250,702.72/2,291.16
6. Step 6: Final answer
   x = 2,728.18