Finding the Fourth Proportional to 1,039.73, 1,434.33 and 619.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.73 : 1,434.33 = 619.83 : x
2. Step 2: Convert to fraction form
   1,039.73/1,434.33 = 619.83/x
3. Step 3: Cross multiply
   1,039.73x = 1,434.33 × 619.83
4. Step 4: Simplify right side
   1,039.73x = 889,040.76
5. Step 5: Solve for x
   x = 889,040.76/1,039.73
6. Step 6: Final answer
   x = 855.07