Finding the Fourth Proportional to 2,173.32, 3,261.50 and 874.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.32 : 3,261.50 = 874.79 : x
2. Step 2: Convert to fraction form
   2,173.32/3,261.50 = 874.79/x
3. Step 3: Cross multiply
   2,173.32x = 3,261.50 × 874.79
4. Step 4: Simplify right side
   2,173.32x = 2,853,106.90
5. Step 5: Solve for x
   x = 2,853,106.90/2,173.32
6. Step 6: Final answer
   x = 1,312.79