Finding the Fourth Proportional to 2,573.40, 3,857.79 and 929.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.40 : 3,857.79 = 929.56 : x
2. Step 2: Convert to fraction form
   2,573.40/3,857.79 = 929.56/x
3. Step 3: Cross multiply
   2,573.40x = 3,857.79 × 929.56
4. Step 4: Simplify right side
   2,573.40x = 3,586,047.27
5. Step 5: Solve for x
   x = 3,586,047.27/2,573.40
6. Step 6: Final answer
   x = 1,393.51