Finding the Fourth Proportional to 1,418.32, 1,957.18 and 788.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.32 : 1,957.18 = 788.81 : x
2. Step 2: Convert to fraction form
   1,418.32/1,957.18 = 788.81/x
3. Step 3: Cross multiply
   1,418.32x = 1,957.18 × 788.81
4. Step 4: Simplify right side
   1,418.32x = 1,543,843.16
5. Step 5: Solve for x
   x = 1,543,843.16/1,418.32
6. Step 6: Final answer
   x = 1,088.50