Finding the Fourth Proportional to 1,045.37, 1,443.12 and 808.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.37 : 1,443.12 = 808.78 : x
2. Step 2: Convert to fraction form
   1,045.37/1,443.12 = 808.78/x
3. Step 3: Cross multiply
   1,045.37x = 1,443.12 × 808.78
4. Step 4: Simplify right side
   1,045.37x = 1,167,166.59
5. Step 5: Solve for x
   x = 1,167,166.59/1,045.37
6. Step 6: Final answer
   x = 1,116.51