Finding the Fourth Proportional to 2,080.42, 3,120.73 and 619.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.42 : 3,120.73 = 619.59 : x
2. Step 2: Convert to fraction form
   2,080.42/3,120.73 = 619.59/x
3. Step 3: Cross multiply
   2,080.42x = 3,120.73 × 619.59
4. Step 4: Simplify right side
   2,080.42x = 1,933,573.10
5. Step 5: Solve for x
   x = 1,933,573.10/2,080.42
6. Step 6: Final answer
   x = 929.41