Finding the Fourth Proportional to 1,451.31, 2,002.82 and 788.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.31 : 2,002.82 = 788.18 : x
2. Step 2: Convert to fraction form
   1,451.31/2,002.82 = 788.18/x
3. Step 3: Cross multiply
   1,451.31x = 2,002.82 × 788.18
4. Step 4: Simplify right side
   1,451.31x = 1,578,574.62
5. Step 5: Solve for x
   x = 1,578,574.62/1,451.31
6. Step 6: Final answer
   x = 1,087.69