Finding the Fourth Proportional to 1,451.94, 2,003.62 and 788.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.94 : 2,003.62 = 788.78 : x
2. Step 2: Convert to fraction form
   1,451.94/2,003.62 = 788.78/x
3. Step 3: Cross multiply
   1,451.94x = 2,003.62 × 788.78
4. Step 4: Simplify right side
   1,451.94x = 1,580,408.63
5. Step 5: Solve for x
   x = 1,580,408.63/1,451.94
6. Step 6: Final answer
   x = 1,088.48