Finding the Fourth Proportional to 2,117.61, 3,174.59 and 1,020.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.61 : 3,174.59 = 1,020.47 : x
2. Step 2: Convert to fraction form
   2,117.61/3,174.59 = 1,020.47/x
3. Step 3: Cross multiply
   2,117.61x = 3,174.59 × 1,020.47
4. Step 4: Simplify right side
   2,117.61x = 3,239,552.88
5. Step 5: Solve for x
   x = 3,239,552.88/2,117.61
6. Step 6: Final answer
   x = 1,529.82