Finding the Fourth Proportional to 2,788.73, 4,182.86 and 939.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.73 : 4,182.86 = 939.80 : x
2. Step 2: Convert to fraction form
   2,788.73/4,182.86 = 939.80/x
3. Step 3: Cross multiply
   2,788.73x = 4,182.86 × 939.80
4. Step 4: Simplify right side
   2,788.73x = 3,931,051.83
5. Step 5: Solve for x
   x = 3,931,051.83/2,788.73
6. Step 6: Final answer
   x = 1,409.62