Finding the Fourth Proportional to 1,160.76, 1,601.81 and 712.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,160.76 : 1,601.81 = 712.47 : x
2. Step 2: Convert to fraction form
   1,160.76/1,601.81 = 712.47/x
3. Step 3: Cross multiply
   1,160.76x = 1,601.81 × 712.47
4. Step 4: Simplify right side
   1,160.76x = 1,141,238.01
5. Step 5: Solve for x
   x = 1,141,238.01/1,160.76
6. Step 6: Final answer
   x = 983.18