Finding the Fourth Proportional to 1,852.31, 2,778.71 and 619.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,852.31 : 2,778.71 = 619.83 : x
2. Step 2: Convert to fraction form
   1,852.31/2,778.71 = 619.83/x
3. Step 3: Cross multiply
   1,852.31x = 2,778.71 × 619.83
4. Step 4: Simplify right side
   1,852.31x = 1,722,324.72
5. Step 5: Solve for x
   x = 1,722,324.72/1,852.31
6. Step 6: Final answer
   x = 929.82