Finding the Fourth Proportional to 2,389.50, 3,583.34 and 928.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.50 : 3,583.34 = 928.46 : x
2. Step 2: Convert to fraction form
   2,389.50/3,583.34 = 928.46/x
3. Step 3: Cross multiply
   2,389.50x = 3,583.34 × 928.46
4. Step 4: Simplify right side
   2,389.50x = 3,326,987.86
5. Step 5: Solve for x
   x = 3,326,987.86/2,389.50
6. Step 6: Final answer
   x = 1,392.34