Finding the Fourth Proportional to 2,108.80, 3,156.72 and 1,133.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.80 : 3,156.72 = 1,133.56 : x
2. Step 2: Convert to fraction form
   2,108.80/3,156.72 = 1,133.56/x
3. Step 3: Cross multiply
   2,108.80x = 3,156.72 × 1,133.56
4. Step 4: Simplify right side
   2,108.80x = 3,578,331.52
5. Step 5: Solve for x
   x = 3,578,331.52/2,108.80
6. Step 6: Final answer
   x = 1,696.86