Finding the Fourth Proportional to 1,404.72, 2,107.89 and 788.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.72 : 2,107.89 = 788.94 : x
2. Step 2: Convert to fraction form
   1,404.72/2,107.89 = 788.94/x
3. Step 3: Cross multiply
   1,404.72x = 2,107.89 × 788.94
4. Step 4: Simplify right side
   1,404.72x = 1,662,998.74
5. Step 5: Solve for x
   x = 1,662,998.74/1,404.72
6. Step 6: Final answer
   x = 1,183.86