Finding the Fourth Proportional to 2,117.55, 3,174.69 and 801.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117.55 : 3,174.69 = 801.28 : x
2. Step 2: Convert to fraction form
   2,117.55/3,174.69 = 801.28/x
3. Step 3: Cross multiply
   2,117.55x = 3,174.69 × 801.28
4. Step 4: Simplify right side
   2,117.55x = 2,543,799.73
5. Step 5: Solve for x
   x = 2,543,799.73/2,117.55
6. Step 6: Final answer
   x = 1,201.29