Finding the Fourth Proportional to 2,560.34, 3,533.56 and 2,139.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.34 : 3,533.56 = 2,139.94 : x
2. Step 2: Convert to fraction form
   2,560.34/3,533.56 = 2,139.94/x
3. Step 3: Cross multiply
   2,560.34x = 3,533.56 × 2,139.94
4. Step 4: Simplify right side
   2,560.34x = 7,561,606.39
5. Step 5: Solve for x
   x = 7,561,606.39/2,560.34
6. Step 6: Final answer
   x = 2,953.36