Finding the Fourth Proportional to 1,417.96, 1,956.90 and 788.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.96 : 1,956.90 = 788.56 : x
2. Step 2: Convert to fraction form
   1,417.96/1,956.90 = 788.56/x
3. Step 3: Cross multiply
   1,417.96x = 1,956.90 × 788.56
4. Step 4: Simplify right side
   1,417.96x = 1,543,133.06
5. Step 5: Solve for x
   x = 1,543,133.06/1,417.96
6. Step 6: Final answer
   x = 1,088.28