Finding the Fourth Proportional to 1,131.93, 1,562.78 and 712.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.93 : 1,562.78 = 712.86 : x
2. Step 2: Convert to fraction form
   1,131.93/1,562.78 = 712.86/x
3. Step 3: Cross multiply
   1,131.93x = 1,562.78 × 712.86
4. Step 4: Simplify right side
   1,131.93x = 1,114,043.35
5. Step 5: Solve for x
   x = 1,114,043.35/1,131.93
6. Step 6: Final answer
   x = 984.20