Finding the Fourth Proportional to 1,010.73, 1,395.18 and 788.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.73 : 1,395.18 = 788.79 : x
2. Step 2: Convert to fraction form
   1,010.73/1,395.18 = 788.79/x
3. Step 3: Cross multiply
   1,010.73x = 1,395.18 × 788.79
4. Step 4: Simplify right side
   1,010.73x = 1,100,504.03
5. Step 5: Solve for x
   x = 1,100,504.03/1,010.73
6. Step 6: Final answer
   x = 1,088.82