Finding the Fourth Proportional to 2,174.76, 3,259.68 and 874.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.76 : 3,259.68 = 874.72 : x
2. Step 2: Convert to fraction form
   2,174.76/3,259.68 = 874.72/x
3. Step 3: Cross multiply
   2,174.76x = 3,259.68 × 874.72
4. Step 4: Simplify right side
   2,174.76x = 2,851,307.29
5. Step 5: Solve for x
   x = 2,851,307.29/2,174.76
6. Step 6: Final answer
   x = 1,311.09