Finding the Fourth Proportional to 3,914.55, 5,407.89 and 2,573.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.55 : 5,407.89 = 2,573.31 : x
2. Step 2: Convert to fraction form
   3,914.55/5,407.89 = 2,573.31/x
3. Step 3: Cross multiply
   3,914.55x = 5,407.89 × 2,573.31
4. Step 4: Simplify right side
   3,914.55x = 13,916,177.42
5. Step 5: Solve for x
   x = 13,916,177.42/3,914.55
6. Step 6: Final answer
   x = 3,554.99