Finding the Fourth Proportional to 1,417.97, 1,956.87 and 788.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.97 : 1,956.87 = 788.51 : x
2. Step 2: Convert to fraction form
   1,417.97/1,956.87 = 788.51/x
3. Step 3: Cross multiply
   1,417.97x = 1,956.87 × 788.51
4. Step 4: Simplify right side
   1,417.97x = 1,543,009.59
5. Step 5: Solve for x
   x = 1,543,009.59/1,417.97
6. Step 6: Final answer
   x = 1,088.18