Finding the Fourth Proportional to 1,451.94, 2,003.69 and 788.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.94 : 2,003.69 = 788.80 : x
2. Step 2: Convert to fraction form
   1,451.94/2,003.69 = 788.80/x
3. Step 3: Cross multiply
   1,451.94x = 2,003.69 × 788.80
4. Step 4: Simplify right side
   1,451.94x = 1,580,510.67
5. Step 5: Solve for x
   x = 1,580,510.67/1,451.94
6. Step 6: Final answer
   x = 1,088.55