Finding the Fourth Proportional to 1,012.15, 1,396.78 and 592.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.15 : 1,396.78 = 592.43 : x
2. Step 2: Convert to fraction form
   1,012.15/1,396.78 = 592.43/x
3. Step 3: Cross multiply
   1,012.15x = 1,396.78 × 592.43
4. Step 4: Simplify right side
   1,012.15x = 827,494.38
5. Step 5: Solve for x
   x = 827,494.38/1,012.15
6. Step 6: Final answer
   x = 817.56