Finding the Fourth Proportional to 2,171.34, 3,256.80 and 1,074.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.34 : 3,256.80 = 1,074.60 : x
2. Step 2: Convert to fraction form
   2,171.34/3,256.80 = 1,074.60/x
3. Step 3: Cross multiply
   2,171.34x = 3,256.80 × 1,074.60
4. Step 4: Simplify right side
   2,171.34x = 3,499,757.28
5. Step 5: Solve for x
   x = 3,499,757.28/2,171.34
6. Step 6: Final answer
   x = 1,611.80