Finding the Fourth Proportional to 2,128.98, 3,193.23 and 569.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.98 : 3,193.23 = 569.15 : x
2. Step 2: Convert to fraction form
   2,128.98/3,193.23 = 569.15/x
3. Step 3: Cross multiply
   2,128.98x = 3,193.23 × 569.15
4. Step 4: Simplify right side
   2,128.98x = 1,817,410.89
5. Step 5: Solve for x
   x = 1,817,410.89/2,128.98
6. Step 6: Final answer
   x = 853.65