Finding the Fourth Proportional to 2,485.83, 3,728.88 and 926.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.83 : 3,728.88 = 926.25 : x
2. Step 2: Convert to fraction form
   2,485.83/3,728.88 = 926.25/x
3. Step 3: Cross multiply
   2,485.83x = 3,728.88 × 926.25
4. Step 4: Simplify right side
   2,485.83x = 3,453,875.10
5. Step 5: Solve for x
   x = 3,453,875.10/2,485.83
6. Step 6: Final answer
   x = 1,389.43