Finding the Fourth Proportional to 2,573.91, 3,858.54 and 929.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.91 : 3,858.54 = 929.30 : x
2. Step 2: Convert to fraction form
   2,573.91/3,858.54 = 929.30/x
3. Step 3: Cross multiply
   2,573.91x = 3,858.54 × 929.30
4. Step 4: Simplify right side
   2,573.91x = 3,585,721.93
5. Step 5: Solve for x
   x = 3,585,721.93/2,573.91
6. Step 6: Final answer
   x = 1,393.10