Finding the Fourth Proportional to 1,418.15, 1,956.87 and 788.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.15 : 1,956.87 = 788.51 : x
2. Step 2: Convert to fraction form
   1,418.15/1,956.87 = 788.51/x
3. Step 3: Cross multiply
   1,418.15x = 1,956.87 × 788.51
4. Step 4: Simplify right side
   1,418.15x = 1,543,016.46
5. Step 5: Solve for x
   x = 1,543,016.46/1,418.15
6. Step 6: Final answer
   x = 1,088.05