Finding the Fourth Proportional to 1,009.41, 1,394.00 and 801.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.41 : 1,394.00 = 801.78 : x
2. Step 2: Convert to fraction form
   1,009.41/1,394.00 = 801.78/x
3. Step 3: Cross multiply
   1,009.41x = 1,394.00 × 801.78
4. Step 4: Simplify right side
   1,009.41x = 1,117,677.31
5. Step 5: Solve for x
   x = 1,117,677.31/1,009.41
6. Step 6: Final answer
   x = 1,107.26