Finding the Fourth Proportional to 2,788.86, 4,177.71 and 1,329.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.86 : 4,177.71 = 1,329.42 : x
2. Step 2: Convert to fraction form
   2,788.86/4,177.71 = 1,329.42/x
3. Step 3: Cross multiply
   2,788.86x = 4,177.71 × 1,329.42
4. Step 4: Simplify right side
   2,788.86x = 5,553,931.23
5. Step 5: Solve for x
   x = 5,553,931.23/2,788.86
6. Step 6: Final answer
   x = 1,991.47