Finding the Fourth Proportional to 1,417.77, 1,956.30 and 788.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.77 : 1,956.30 = 788.29 : x
2. Step 2: Convert to fraction form
   1,417.77/1,956.30 = 788.29/x
3. Step 3: Cross multiply
   1,417.77x = 1,956.30 × 788.29
4. Step 4: Simplify right side
   1,417.77x = 1,542,131.73
5. Step 5: Solve for x
   x = 1,542,131.73/1,417.77
6. Step 6: Final answer
   x = 1,087.72