Finding the Fourth Proportional to 1,409.81, 1,945.55 and 788.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,409.81 : 1,945.55 = 788.81 : x
2. Step 2: Convert to fraction form
   1,409.81/1,945.55 = 788.81/x
3. Step 3: Cross multiply
   1,409.81x = 1,945.55 × 788.81
4. Step 4: Simplify right side
   1,409.81x = 1,534,669.30
5. Step 5: Solve for x
   x = 1,534,669.30/1,409.81
6. Step 6: Final answer
   x = 1,088.56