Finding the Fourth Proportional to 1,530.07, 2,111.49 and 831.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.07 : 2,111.49 = 831.46 : x
2. Step 2: Convert to fraction form
   1,530.07/2,111.49 = 831.46/x
3. Step 3: Cross multiply
   1,530.07x = 2,111.49 × 831.46
4. Step 4: Simplify right side
   1,530.07x = 1,755,619.48
5. Step 5: Solve for x
   x = 1,755,619.48/1,530.07
6. Step 6: Final answer
   x = 1,147.41