Finding the Fourth Proportional to 2,574.70, 3,553.31 and 2,154.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,574.70 : 3,553.31 = 2,154.31 : x
2. Step 2: Convert to fraction form
   2,574.70/3,553.31 = 2,154.31/x
3. Step 3: Cross multiply
   2,574.70x = 3,553.31 × 2,154.31
4. Step 4: Simplify right side
   2,574.70x = 7,654,931.27
5. Step 5: Solve for x
   x = 7,654,931.27/2,574.70
6. Step 6: Final answer
   x = 2,973.14