Finding the Fourth Proportional to 2,156.10, 3,226.86 and 1,791.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.10 : 3,226.86 = 1,791.60 : x
2. Step 2: Convert to fraction form
   2,156.10/3,226.86 = 1,791.60/x
3. Step 3: Cross multiply
   2,156.10x = 3,226.86 × 1,791.60
4. Step 4: Simplify right side
   2,156.10x = 5,781,242.38
5. Step 5: Solve for x
   x = 5,781,242.38/2,156.10
6. Step 6: Final answer
   x = 2,681.34