Finding the Fourth Proportional to 1,131.68, 1,562.10 and 712.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.68 : 1,562.10 = 712.73 : x
2. Step 2: Convert to fraction form
   1,131.68/1,562.10 = 712.73/x
3. Step 3: Cross multiply
   1,131.68x = 1,562.10 × 712.73
4. Step 4: Simplify right side
   1,131.68x = 1,113,365.04
5. Step 5: Solve for x
   x = 1,113,365.04/1,131.68
6. Step 6: Final answer
   x = 983.81