Finding the Fourth Proportional to 3,394.10, 5,090.50 and 928.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,394.10 : 5,090.50 = 928.59 : x
2. Step 2: Convert to fraction form
   3,394.10/5,090.50 = 928.59/x
3. Step 3: Cross multiply
   3,394.10x = 5,090.50 × 928.59
4. Step 4: Simplify right side
   3,394.10x = 4,726,978.56
5. Step 5: Solve for x
   x = 4,726,978.56/3,394.10
6. Step 6: Final answer
   x = 1,392.70