Finding the Fourth Proportional to 2,505.06, 3,456.54 and 2,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.06 : 3,456.54 = 2,131.56 : x
2. Step 2: Convert to fraction form
   2,505.06/3,456.54 = 2,131.56/x
3. Step 3: Cross multiply
   2,505.06x = 3,456.54 × 2,131.56
4. Step 4: Simplify right side
   2,505.06x = 7,367,822.40
5. Step 5: Solve for x
   x = 7,367,822.40/2,505.06
6. Step 6: Final answer
   x = 2,941.18