Finding the Fourth Proportional to 2,145.98, 3,220.59 and 1,570.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.98 : 3,220.59 = 1,570.34 : x
2. Step 2: Convert to fraction form
   2,145.98/3,220.59 = 1,570.34/x
3. Step 3: Cross multiply
   2,145.98x = 3,220.59 × 1,570.34
4. Step 4: Simplify right side
   2,145.98x = 5,057,421.30
5. Step 5: Solve for x
   x = 5,057,421.30/2,145.98
6. Step 6: Final answer
   x = 2,356.70