Finding the Fourth Proportional to 1,485.76, 2,228.74 and 498.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.76 : 2,228.74 = 498.54 : x
2. Step 2: Convert to fraction form
   1,485.76/2,228.74 = 498.54/x
3. Step 3: Cross multiply
   1,485.76x = 2,228.74 × 498.54
4. Step 4: Simplify right side
   1,485.76x = 1,111,116.04
5. Step 5: Solve for x
   x = 1,111,116.04/1,485.76
6. Step 6: Final answer
   x = 747.84