Finding the Fourth Proportional to 5,570.12, 8,355.34 and 1,821.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,570.12 : 8,355.34 = 1,821.89 : x
2. Step 2: Convert to fraction form
   5,570.12/8,355.34 = 1,821.89/x
3. Step 3: Cross multiply
   5,570.12x = 8,355.34 × 1,821.89
4. Step 4: Simplify right side
   5,570.12x = 15,222,510.39
5. Step 5: Solve for x
   x = 15,222,510.39/5,570.12
6. Step 6: Final answer
   x = 2,732.89