Finding the Fourth Proportional to 1,147.56, 1,721.50 and 498.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,147.56 : 1,721.50 = 498.28 : x
2. Step 2: Convert to fraction form
   1,147.56/1,721.50 = 498.28/x
3. Step 3: Cross multiply
   1,147.56x = 1,721.50 × 498.28
4. Step 4: Simplify right side
   1,147.56x = 857,789.02
5. Step 5: Solve for x
   x = 857,789.02/1,147.56
6. Step 6: Final answer
   x = 747.49