Finding the Fourth Proportional to 1,131.03, 1,561.82 and 712.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.03 : 1,561.82 = 712.13 : x
2. Step 2: Convert to fraction form
   1,131.03/1,561.82 = 712.13/x
3. Step 3: Cross multiply
   1,131.03x = 1,561.82 × 712.13
4. Step 4: Simplify right side
   1,131.03x = 1,112,207.51
5. Step 5: Solve for x
   x = 1,112,207.51/1,131.03
6. Step 6: Final answer
   x = 983.36