Finding the Fourth Proportional to 1,409.91, 1,945.67 and 788.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.91 : 1,945.67 = 788.91 : x
2. Step 2: Convert to fraction form
   1,409.91/1,945.67 = 788.91/x
3. Step 3: Cross multiply
   1,409.91x = 1,945.67 × 788.91
4. Step 4: Simplify right side
   1,409.91x = 1,534,951.72
5. Step 5: Solve for x
   x = 1,534,951.72/1,409.91
6. Step 6: Final answer
   x = 1,088.69