Finding the Fourth Proportional to 1,451.25, 2,002.72 and 788.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.25 : 2,002.72 = 788.12 : x
2. Step 2: Convert to fraction form
   1,451.25/2,002.72 = 788.12/x
3. Step 3: Cross multiply
   1,451.25x = 2,002.72 × 788.12
4. Step 4: Simplify right side
   1,451.25x = 1,578,383.69
5. Step 5: Solve for x
   x = 1,578,383.69/1,451.25
6. Step 6: Final answer
   x = 1,087.60