Finding the Fourth Proportional to 2,040.72, 3,061.56 and 579.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,040.72 : 3,061.56 = 579.84 : x
2. Step 2: Convert to fraction form
   2,040.72/3,061.56 = 579.84/x
3. Step 3: Cross multiply
   2,040.72x = 3,061.56 × 579.84
4. Step 4: Simplify right side
   2,040.72x = 1,775,214.95
5. Step 5: Solve for x
   x = 1,775,214.95/2,040.72
6. Step 6: Final answer
   x = 869.90