Finding the Fourth Proportional to 1,006.86, 1,388.55 and 794.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,006.86 : 1,388.55 = 794.31 : x
2. Step 2: Convert to fraction form
   1,006.86/1,388.55 = 794.31/x
3. Step 3: Cross multiply
   1,006.86x = 1,388.55 × 794.31
4. Step 4: Simplify right side
   1,006.86x = 1,102,939.15
5. Step 5: Solve for x
   x = 1,102,939.15/1,006.86
6. Step 6: Final answer
   x = 1,095.42