Finding the Fourth Proportional to 2,570.20, 3,856.84 and 1,089.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.20 : 3,856.84 = 1,089.34 : x
2. Step 2: Convert to fraction form
   2,570.20/3,856.84 = 1,089.34/x
3. Step 3: Cross multiply
   2,570.20x = 3,856.84 × 1,089.34
4. Step 4: Simplify right side
   2,570.20x = 4,201,411.63
5. Step 5: Solve for x
   x = 4,201,411.63/2,570.20
6. Step 6: Final answer
   x = 1,634.66