Finding the Fourth Proportional to 1,010.24, 1,394.52 and 778.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,010.24 : 1,394.52 = 778.04 : x
2. Step 2: Convert to fraction form
   1,010.24/1,394.52 = 778.04/x
3. Step 3: Cross multiply
   1,010.24x = 1,394.52 × 778.04
4. Step 4: Simplify right side
   1,010.24x = 1,084,992.34
5. Step 5: Solve for x
   x = 1,084,992.34/1,010.24
6. Step 6: Final answer
   x = 1,073.99