Finding the Fourth Proportional to 2,572.28, 3,858.82 and 929.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.28 : 3,858.82 = 929.23 : x
2. Step 2: Convert to fraction form
   2,572.28/3,858.82 = 929.23/x
3. Step 3: Cross multiply
   2,572.28x = 3,858.82 × 929.23
4. Step 4: Simplify right side
   2,572.28x = 3,585,731.31
5. Step 5: Solve for x
   x = 3,585,731.31/2,572.28
6. Step 6: Final answer
   x = 1,393.99