Finding the Fourth Proportional to 1,451.74, 2,003.37 and 788.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.74 : 2,003.37 = 788.57 : x
2. Step 2: Convert to fraction form
   1,451.74/2,003.37 = 788.57/x
3. Step 3: Cross multiply
   1,451.74x = 2,003.37 × 788.57
4. Step 4: Simplify right side
   1,451.74x = 1,579,797.48
5. Step 5: Solve for x
   x = 1,579,797.48/1,451.74
6. Step 6: Final answer
   x = 1,088.21