Finding the Fourth Proportional to 1,147.96, 1,721.49 and 498.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.96 : 1,721.49 = 498.25 : x
2. Step 2: Convert to fraction form
   1,147.96/1,721.49 = 498.25/x
3. Step 3: Cross multiply
   1,147.96x = 1,721.49 × 498.25
4. Step 4: Simplify right side
   1,147.96x = 857,732.39
5. Step 5: Solve for x
   x = 857,732.39/1,147.96
6. Step 6: Final answer
   x = 747.18