Finding the Fourth Proportional to 1,047.20, 1,569.69 and 498.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.20 : 1,569.69 = 498.71 : x
2. Step 2: Convert to fraction form
   1,047.20/1,569.69 = 498.71/x
3. Step 3: Cross multiply
   1,047.20x = 1,569.69 × 498.71
4. Step 4: Simplify right side
   1,047.20x = 782,820.10
5. Step 5: Solve for x
   x = 782,820.10/1,047.20
6. Step 6: Final answer
   x = 747.54