Finding the Fourth Proportional to 2,852.70, 4,279.71 and 904.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,852.70 : 4,279.71 = 904.89 : x
2. Step 2: Convert to fraction form
   2,852.70/4,279.71 = 904.89/x
3. Step 3: Cross multiply
   2,852.70x = 4,279.71 × 904.89
4. Step 4: Simplify right side
   2,852.70x = 3,872,666.78
5. Step 5: Solve for x
   x = 3,872,666.78/2,852.70
6. Step 6: Final answer
   x = 1,357.54